diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index 474cd95..3549c23 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,16 @@
+2019-10-15  Alex Christensen  <achristensen@webkit.org>
+
+        Unreviewed, rolling out r251138.
+
+        Broke API tests
+
+        Reverted changeset:
+
+        "Pass CORS-enabled schemes through WebProcess instead of
+        having them NetworkProcess-global"
+        https://bugs.webkit.org/show_bug.cgi?id=202891
+        https://trac.webkit.org/changeset/251138
+
 2019-10-15  Chris Dumez  <cdumez@apple.com>
 
         Stop using inheritance for WebBackForwardCacheEntry
diff --git a/Source/WebCore/platform/LegacySchemeRegistry.cpp b/Source/WebCore/platform/LegacySchemeRegistry.cpp
index 87eae26..5ca5e09 100644
--- a/Source/WebCore/platform/LegacySchemeRegistry.cpp
+++ b/Source/WebCore/platform/LegacySchemeRegistry.cpp
@@ -26,7 +26,6 @@
 #include "config.h"
 #include "LegacySchemeRegistry.h"
 
-#include "RuntimeApplicationChecks.h"
 #include <wtf/Lock.h>
 #include <wtf/Locker.h>
 #include <wtf/MainThread.h>
@@ -422,7 +421,6 @@
 
 void LegacySchemeRegistry::registerURLSchemeAsCORSEnabled(const String& scheme)
 {
-    ASSERT(!isInNetworkProcess());
     if (scheme.isNull())
         return;
     CORSEnabledSchemes().add(scheme);
@@ -430,16 +428,9 @@
 
 bool LegacySchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(const String& scheme)
 {
-    ASSERT(!isInNetworkProcess());
     return !scheme.isNull() && CORSEnabledSchemes().contains(scheme);
 }
 
-Vector<String> LegacySchemeRegistry::allURLSchemesRegisteredAsCORSEnabled()
-{
-    ASSERT(!isInNetworkProcess());
-    return copyToVector(CORSEnabledSchemes());
-}
-
 void LegacySchemeRegistry::registerURLSchemeAsBypassingContentSecurityPolicy(const String& scheme)
 {
     if (scheme.isNull())
diff --git a/Source/WebCore/platform/LegacySchemeRegistry.h b/Source/WebCore/platform/LegacySchemeRegistry.h
index 63c4768..273c5b1 100644
--- a/Source/WebCore/platform/LegacySchemeRegistry.h
+++ b/Source/WebCore/platform/LegacySchemeRegistry.h
@@ -81,7 +81,6 @@
     // Allow non-HTTP schemes to be registered to allow CORS requests.
     WEBCORE_EXPORT static void registerURLSchemeAsCORSEnabled(const String& scheme);
     WEBCORE_EXPORT static bool shouldTreatURLSchemeAsCORSEnabled(const String& scheme);
-    WEBCORE_EXPORT static Vector<String> allURLSchemesRegisteredAsCORSEnabled();
 
     // Allow resources from some schemes to load on a page, regardless of its
     // Content Security Policy.
diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
index bf08883..12cc035 100644
--- a/Source/WebKit/ChangeLog
+++ b/Source/WebKit/ChangeLog
@@ -1,3 +1,16 @@
+2019-10-15  Alex Christensen  <achristensen@webkit.org>
+
+        Unreviewed, rolling out r251138.
+
+        Broke API tests
+
+        Reverted changeset:
+
+        "Pass CORS-enabled schemes through WebProcess instead of
+        having them NetworkProcess-global"
+        https://bugs.webkit.org/show_bug.cgi?id=202891
+        https://trac.webkit.org/changeset/251138
+
 2019-10-15  Chris Dumez  <cdumez@apple.com>
 
         Stop using inheritance for WebBackForwardCacheEntry
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
index 683b5e2..c8a0766 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.cpp
@@ -42,7 +42,6 @@
 #include "NetworkResourceLoadParameters.h"
 #include "NetworkResourceLoader.h"
 #include "NetworkResourceLoaderMessages.h"
-#include "NetworkSchemeRegistry.h"
 #include "NetworkSession.h"
 #include "NetworkSocketChannel.h"
 #include "NetworkSocketChannelMessages.h"
@@ -94,7 +93,6 @@
     , m_mdnsRegister(*this)
 #endif
     , m_webProcessIdentifier(webProcessIdentifier)
-    , m_schemeRegistry(NetworkSchemeRegistry::create())
 {
     RELEASE_ASSERT(RunLoop::isMain());
 
@@ -443,7 +441,7 @@
     };
 
     // PingLoad manages its own lifetime, deleting itself when its purpose has been fulfilled.
-    new PingLoad(*this, WTFMove(loadParameters), WTFMove(completionHandler));
+    new PingLoad(*this, networkProcess(), WTFMove(loadParameters), WTFMove(completionHandler));
 }
 
 void NetworkConnectionToWebProcess::setOnLineState(bool isOnLine)
@@ -532,12 +530,6 @@
     loader->convertToDownload(downloadID, request, response);
 }
 
-void NetworkConnectionToWebProcess::registerURLSchemesAsCORSEnabled(Vector<String>&& schemes)
-{
-    for (auto&& scheme : schemes)
-        m_schemeRegistry->registerURLSchemeAsCORSEnabled(WTFMove(scheme));
-}
-
 void NetworkConnectionToWebProcess::cookiesForDOM(const URL& firstParty, const SameSiteInfo& sameSiteInfo, const URL& url, Optional<FrameIdentifier> frameID, Optional<PageIdentifier> pageID, IncludeSecureCookies includeSecureCookies, CompletionHandler<void(String cookieString, bool secureCookiesAccessed)>&& completionHandler)
 {
     auto* networkStorageSession = storageSession();
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
index af328ee..64e6d71 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.h
@@ -62,7 +62,6 @@
 
 namespace WebKit {
 
-class NetworkSchemeRegistry;
 class NetworkProcess;
 class NetworkResourceLoader;
 class NetworkSession;
@@ -160,8 +159,6 @@
     void serverToContextConnectionNoLongerNeeded();
 #endif
 
-    NetworkSchemeRegistry& schemeRegistry() { return m_schemeRegistry.get(); }
-
 private:
     NetworkConnectionToWebProcess(NetworkProcess&, WebCore::ProcessIdentifier, PAL::SessionID, IPC::Connection::Identifier);
 
@@ -191,8 +188,6 @@
     void startDownload(DownloadID, const WebCore::ResourceRequest&, const String& suggestedName = { });
     void convertMainResourceLoadToDownload(uint64_t mainResourceLoadIdentifier, DownloadID, const WebCore::ResourceRequest&, const WebCore::ResourceResponse&);
 
-    void registerURLSchemesAsCORSEnabled(Vector<String>&& schemes);
-
     void cookiesForDOM(const URL& firstParty, const WebCore::SameSiteInfo&, const URL&, Optional<WebCore::FrameIdentifier>, Optional<WebCore::PageIdentifier>, WebCore::IncludeSecureCookies, CompletionHandler<void(String cookieString, bool secureCookiesAccessed)>&&);
     void setCookiesFromDOM(const URL& firstParty, const WebCore::SameSiteInfo&, const URL&, Optional<WebCore::FrameIdentifier>, Optional<WebCore::PageIdentifier>, const String&);
     void cookiesEnabled(CompletionHandler<void(bool)>&&);
@@ -346,7 +341,6 @@
 
     HashSet<WebCore::MessagePortIdentifier> m_processEntangledPorts;
     HashMap<uint64_t, Function<void()>> m_messageBatchDeliveryCompletionHandlers;
-    Ref<NetworkSchemeRegistry> m_schemeRegistry;
 };
 
 } // namespace WebKit
diff --git a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
index 6c2eb80..3bcd0eb 100644
--- a/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
+++ b/Source/WebKit/NetworkProcess/NetworkConnectionToWebProcess.messages.in
@@ -92,5 +92,4 @@
     PostMessageToRemote(struct WebCore::MessageWithMessagePorts message, struct WebCore::MessagePortIdentifier remote)
     CheckRemotePortForActivity(struct WebCore::MessagePortIdentifier port) -> (bool hasActivity) Async
     DidDeliverMessagePortMessages(uint64_t messageBatchIdentifier)
-    RegisterURLSchemesAsCORSEnabled(Vector<String> schemes);
 }
diff --git a/Source/WebKit/NetworkProcess/NetworkLoadChecker.cpp b/Source/WebKit/NetworkProcess/NetworkLoadChecker.cpp
index 8477507..dc9fd8f 100644
--- a/Source/WebKit/NetworkProcess/NetworkLoadChecker.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkLoadChecker.cpp
@@ -30,7 +30,6 @@
 #include "Logging.h"
 #include "NetworkCORSPreflightChecker.h"
 #include "NetworkProcess.h"
-#include "NetworkSchemeRegistry.h"
 #include <WebCore/ContentRuleListResults.h>
 #include <WebCore/ContentSecurityPolicy.h>
 #include <WebCore/CrossOriginAccessControl.h>
@@ -49,10 +48,10 @@
     return url.protocolIsData() || url.protocolIsBlob() || !origin || origin->canRequest(url);
 }
 
-NetworkLoadChecker::NetworkLoadChecker(Ref<NetworkProcess>&& networkProcess, RefPtr<NetworkSchemeRegistry>&& schemeRegistry, FetchOptions&& options, PAL::SessionID sessionID, WebPageProxyIdentifier webPageProxyID, HTTPHeaderMap&& originalRequestHeaders, URL&& url, RefPtr<SecurityOrigin>&& sourceOrigin, RefPtr<SecurityOrigin>&& topOrigin, PreflightPolicy preflightPolicy, String&& referrer, bool isHTTPSUpgradeEnabled, bool shouldCaptureExtraNetworkLoadMetrics, LoadType requestLoadType)
+NetworkLoadChecker::NetworkLoadChecker(NetworkProcess& networkProcess, FetchOptions&& options, PAL::SessionID sessionID, WebPageProxyIdentifier webPageProxyID, HTTPHeaderMap&& originalRequestHeaders, URL&& url, RefPtr<SecurityOrigin>&& sourceOrigin, RefPtr<SecurityOrigin>&& topOrigin, PreflightPolicy preflightPolicy, String&& referrer, bool isHTTPSUpgradeEnabled, bool shouldCaptureExtraNetworkLoadMetrics, LoadType requestLoadType)
     : m_options(WTFMove(options))
     , m_sessionID(sessionID)
-    , m_networkProcess(WTFMove(networkProcess))
+    , m_networkProcess(networkProcess)
     , m_webPageProxyID(webPageProxyID)
     , m_originalRequestHeaders(WTFMove(originalRequestHeaders))
     , m_url(WTFMove(url))
@@ -63,7 +62,6 @@
     , m_shouldCaptureExtraNetworkLoadMetrics(shouldCaptureExtraNetworkLoadMetrics)
     , m_isHTTPSUpgradeEnabled(isHTTPSUpgradeEnabled)
     , m_requestLoadType(requestLoadType)
-    , m_schemeRegistry(WTFMove(schemeRegistry))
 {
     m_isSameOriginRequest = isSameOrigin(m_url, m_origin.get());
     switch (options.credentials) {
@@ -438,7 +436,7 @@
     if (m_options.mode == FetchOptions::Mode::NoCors || m_options.mode == FetchOptions::Mode::Navigate)
         return true;
 
-    if (m_schemeRegistry && !m_schemeRegistry->shouldTreatURLSchemeAsCORSEnabled(url.protocol()))
+    if (!LegacySchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(url.protocol().toStringWithoutCopying()))
         return true;
 
     return m_isSameOriginRequest;
diff --git a/Source/WebKit/NetworkProcess/NetworkLoadChecker.h b/Source/WebKit/NetworkProcess/NetworkLoadChecker.h
index 2715868..0c0fbc8 100644
--- a/Source/WebKit/NetworkProcess/NetworkLoadChecker.h
+++ b/Source/WebKit/NetworkProcess/NetworkLoadChecker.h
@@ -50,14 +50,13 @@
 
 class NetworkCORSPreflightChecker;
 class NetworkProcess;
-class NetworkSchemeRegistry;
 
 class NetworkLoadChecker : public CanMakeWeakPtr<NetworkLoadChecker> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     enum class LoadType : bool { MainFrame, Other };
 
-    NetworkLoadChecker(Ref<NetworkProcess>&&, RefPtr<NetworkSchemeRegistry>&&, WebCore::FetchOptions&&, PAL::SessionID, WebPageProxyIdentifier, WebCore::HTTPHeaderMap&&, URL&&, RefPtr<WebCore::SecurityOrigin>&&, RefPtr<WebCore::SecurityOrigin>&& topOrigin, WebCore::PreflightPolicy, String&& referrer, bool isHTTPSUpgradeEnabled = false, bool shouldCaptureExtraNetworkLoadMetrics = false, LoadType requestLoadType = LoadType::Other);
+    NetworkLoadChecker(NetworkProcess&, WebCore::FetchOptions&&, PAL::SessionID, WebPageProxyIdentifier, WebCore::HTTPHeaderMap&&, URL&&, RefPtr<WebCore::SecurityOrigin>&&, RefPtr<WebCore::SecurityOrigin>&& topOrigin, WebCore::PreflightPolicy, String&& referrer, bool isHTTPSUpgradeEnabled = false, bool shouldCaptureExtraNetworkLoadMetrics = false, LoadType requestLoadType = LoadType::Other);
     ~NetworkLoadChecker();
 
     struct RedirectionTriplet {
@@ -156,7 +155,6 @@
     WebCore::NetworkLoadInformation m_loadInformation;
 
     LoadType m_requestLoadType;
-    RefPtr<NetworkSchemeRegistry> m_schemeRegistry;
 };
 
 }
diff --git a/Source/WebKit/NetworkProcess/NetworkProcess.cpp b/Source/WebKit/NetworkProcess/NetworkProcess.cpp
index f6ff26a..14259b1 100644
--- a/Source/WebKit/NetworkProcess/NetworkProcess.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkProcess.cpp
@@ -350,6 +350,9 @@
     for (auto& scheme : parameters.urlSchemesRegisteredAsNoAccess)
         registerURLSchemeAsNoAccess(scheme);
 
+    for (auto& scheme : parameters.urlSchemesRegisteredAsCORSEnabled)
+        registerURLSchemeAsCORSEnabled(scheme);
+
     for (auto& scheme : parameters.urlSchemesRegisteredAsCanDisplayOnlyIfCanRequest)
         registerURLSchemeAsCanDisplayOnlyIfCanRequest(scheme);
     
@@ -2218,6 +2221,11 @@
     LegacySchemeRegistry::registerURLSchemeAsNoAccess(scheme);
 }
 
+void NetworkProcess::registerURLSchemeAsCORSEnabled(const String& scheme) const
+{
+    LegacySchemeRegistry::registerURLSchemeAsCORSEnabled(scheme);
+}
+
 void NetworkProcess::registerURLSchemeAsCanDisplayOnlyIfCanRequest(const String& scheme) const
 {
     LegacySchemeRegistry::registerAsCanDisplayOnlyIfCanRequest(scheme);
diff --git a/Source/WebKit/NetworkProcess/NetworkProcess.messages.in b/Source/WebKit/NetworkProcess/NetworkProcess.messages.in
index eb3d3f9..ce5b6ba 100644
--- a/Source/WebKit/NetworkProcess/NetworkProcess.messages.in
+++ b/Source/WebKit/NetworkProcess/NetworkProcess.messages.in
@@ -145,6 +145,7 @@
     RegisterURLSchemeAsBypassingContentSecurityPolicy(String scheme)
     RegisterURLSchemeAsLocal(String scheme)
     RegisterURLSchemeAsNoAccess(String scheme)
+    RegisterURLSchemeAsCORSEnabled(String scheme)
     RegisterURLSchemeAsCanDisplayOnlyIfCanRequest(String scheme)
 
     SetCacheStorageParameters(PAL::SessionID sessionID, String cacheStorageDirectory, WebKit::SandboxExtension::Handle handle);
diff --git a/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.cpp b/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.cpp
index 5527ceb..6669a1d 100644
--- a/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.cpp
@@ -72,6 +72,7 @@
     encoder << urlSchemesRegisteredAsBypassingContentSecurityPolicy;
     encoder << urlSchemesRegisteredAsLocal;
     encoder << urlSchemesRegisteredAsNoAccess;
+    encoder << urlSchemesRegisteredAsCORSEnabled;
     encoder << urlSchemesRegisteredAsCanDisplayOnlyIfCanRequest;
 
 #if ENABLE(SERVICE_WORKER)
@@ -158,6 +159,8 @@
         return false;
     if (!decoder.decode(result.urlSchemesRegisteredAsNoAccess))
         return false;
+    if (!decoder.decode(result.urlSchemesRegisteredAsCORSEnabled))
+        return false;
     if (!decoder.decode(result.urlSchemesRegisteredAsCanDisplayOnlyIfCanRequest))
         return false;
 
diff --git a/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.h b/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.h
index 27324ab..e63fc9d 100644
--- a/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.h
+++ b/Source/WebKit/NetworkProcess/NetworkProcessCreationParameters.h
@@ -90,6 +90,7 @@
     Vector<String> urlSchemesRegisteredAsLocal;
     Vector<String> urlSchemesRegisteredAsNoAccess;
     Vector<String> urlSchemesRegisteredAsCanDisplayOnlyIfCanRequest;
+    Vector<String> urlSchemesRegisteredAsCORSEnabled;
 
 #if ENABLE(SERVICE_WORKER)
     String serviceWorkerRegistrationDirectory;
diff --git a/Source/WebKit/NetworkProcess/NetworkResourceLoader.cpp b/Source/WebKit/NetworkProcess/NetworkResourceLoader.cpp
index baf9dc3..d334db6 100644
--- a/Source/WebKit/NetworkProcess/NetworkResourceLoader.cpp
+++ b/Source/WebKit/NetworkProcess/NetworkResourceLoader.cpp
@@ -111,7 +111,7 @@
 
     if (synchronousReply || parameters.shouldRestrictHTTPResponseAccess || parameters.options.keepAlive) {
         NetworkLoadChecker::LoadType requestLoadType = isMainFrameLoad() ? NetworkLoadChecker::LoadType::MainFrame : NetworkLoadChecker::LoadType::Other;
-        m_networkLoadChecker = makeUnique<NetworkLoadChecker>(connection.networkProcess(), &connection.schemeRegistry(), FetchOptions { m_parameters.options }, sessionID(), m_parameters.webPageProxyID, HTTPHeaderMap { m_parameters.originalRequestHeaders }, URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, originalRequest().httpReferrer(), m_parameters.isHTTPSUpgradeEnabled, shouldCaptureExtraNetworkLoadMetrics(), requestLoadType);
+        m_networkLoadChecker = makeUnique<NetworkLoadChecker>(connection.networkProcess(), FetchOptions { m_parameters.options }, sessionID(), m_parameters.webPageProxyID, HTTPHeaderMap { m_parameters.originalRequestHeaders }, URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, originalRequest().httpReferrer(), m_parameters.isHTTPSUpgradeEnabled, shouldCaptureExtraNetworkLoadMetrics(), requestLoadType);
         if (m_parameters.cspResponseHeaders)
             m_networkLoadChecker->setCSPResponseHeaders(ContentSecurityPolicyResponseHeaders { m_parameters.cspResponseHeaders.value() });
 #if ENABLE(CONTENT_EXTENSIONS)
diff --git a/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.cpp b/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.cpp
deleted file mode 100644
index e1ee71f..0000000
--- a/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.cpp
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2019 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "NetworkSchemeRegistry.h"
-
-namespace WebKit {
-
-void NetworkSchemeRegistry::registerURLSchemeAsCORSEnabled(String&& scheme)
-{
-    m_corsEnabledSchemes.add(WTFMove(scheme));
-}
-
-bool NetworkSchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(StringView scheme)
-{
-    return m_corsEnabledSchemes.contains(scheme.toStringWithoutCopying());
-}
-
-} // namespace WebKit
diff --git a/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.h b/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.h
deleted file mode 100644
index d267a48..0000000
--- a/Source/WebKit/NetworkProcess/NetworkSchemeRegistry.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2019 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#pragma once
-
-#include <wtf/HashSet.h>
-#include <wtf/RefCounted.h>
-#include <wtf/text/StringHash.h>
-#include <wtf/text/WTFString.h>
-
-namespace WebKit {
-
-class NetworkSchemeRegistry : public RefCounted<NetworkSchemeRegistry> {
-public:
-    static Ref<NetworkSchemeRegistry> create() { return adoptRef(*new NetworkSchemeRegistry); }
-
-    // Allow non-HTTP schemes to be registered to allow CORS requests.
-    void registerURLSchemeAsCORSEnabled(String&& scheme);
-    bool shouldTreatURLSchemeAsCORSEnabled(StringView scheme);
-
-private:
-    using URLSchemes = HashSet<String, ASCIICaseInsensitiveHash>;
-    URLSchemes m_corsEnabledSchemes;
-};
-
-} // namespace WebKit
diff --git a/Source/WebKit/NetworkProcess/PingLoad.cpp b/Source/WebKit/NetworkProcess/PingLoad.cpp
index 56140e5..00379a3 100644
--- a/Source/WebKit/NetworkProcess/PingLoad.cpp
+++ b/Source/WebKit/NetworkProcess/PingLoad.cpp
@@ -45,17 +45,17 @@
     , m_parameters(WTFMove(parameters))
     , m_completionHandler(WTFMove(completionHandler))
     , m_timeoutTimer(*this, &PingLoad::timeoutTimerFired)
-    , m_networkLoadChecker(makeUniqueRef<NetworkLoadChecker>(networkProcess, nullptr, FetchOptions { m_parameters.options}, m_sessionID, m_parameters.webPageProxyID, WTFMove(m_parameters.originalRequestHeaders), URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, m_parameters.request.httpReferrer()))
+    , m_networkLoadChecker(makeUniqueRef<NetworkLoadChecker>(networkProcess, FetchOptions { m_parameters.options}, m_sessionID, m_parameters.webPageProxyID, WTFMove(m_parameters.originalRequestHeaders), URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, m_parameters.request.httpReferrer()))
 {
     initialize(networkProcess);
 }
 
-PingLoad::PingLoad(NetworkConnectionToWebProcess& connection, NetworkResourceLoadParameters&& parameters, CompletionHandler<void(const ResourceError&, const ResourceResponse&)>&& completionHandler)
+PingLoad::PingLoad(NetworkConnectionToWebProcess& connection, NetworkProcess& networkProcess, NetworkResourceLoadParameters&& parameters, CompletionHandler<void(const ResourceError&, const ResourceResponse&)>&& completionHandler)
     : m_sessionID(connection.sessionID())
     , m_parameters(WTFMove(parameters))
     , m_completionHandler(WTFMove(completionHandler))
     , m_timeoutTimer(*this, &PingLoad::timeoutTimerFired)
-    , m_networkLoadChecker(makeUniqueRef<NetworkLoadChecker>(connection.networkProcess(), &connection.schemeRegistry(), FetchOptions { m_parameters.options}, m_sessionID, m_parameters.webPageProxyID, WTFMove(m_parameters.originalRequestHeaders), URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, m_parameters.request.httpReferrer()))
+    , m_networkLoadChecker(makeUniqueRef<NetworkLoadChecker>(networkProcess, FetchOptions { m_parameters.options}, m_sessionID, m_parameters.webPageProxyID, WTFMove(m_parameters.originalRequestHeaders), URL { m_parameters.request.url() }, m_parameters.sourceOrigin.copyRef(), m_parameters.topOrigin.copyRef(), m_parameters.preflightPolicy, m_parameters.request.httpReferrer()))
     , m_blobFiles(connection.resolveBlobReferences(m_parameters))
 {
     for (auto& file : m_blobFiles) {
@@ -63,7 +63,7 @@
             file->prepareForFileAccess();
     }
 
-    initialize(connection.networkProcess());
+    initialize(networkProcess);
 }
 
 void PingLoad::initialize(NetworkProcess& networkProcess)
diff --git a/Source/WebKit/NetworkProcess/PingLoad.h b/Source/WebKit/NetworkProcess/PingLoad.h
index 08638d9..156a65d0 100644
--- a/Source/WebKit/NetworkProcess/PingLoad.h
+++ b/Source/WebKit/NetworkProcess/PingLoad.h
@@ -38,12 +38,11 @@
 class NetworkConnectionToWebProcess;
 class NetworkLoadChecker;
 class NetworkProcess;
-class NetworkSchemeRegistry;
 
 class PingLoad final : public CanMakeWeakPtr<PingLoad>, private NetworkDataTaskClient {
 public:
     PingLoad(NetworkProcess&, PAL::SessionID, NetworkResourceLoadParameters&&, CompletionHandler<void(const WebCore::ResourceError&, const WebCore::ResourceResponse&)>&&);
-    PingLoad(NetworkConnectionToWebProcess&, NetworkResourceLoadParameters&&, CompletionHandler<void(const WebCore::ResourceError&, const WebCore::ResourceResponse&)>&&);
+    PingLoad(NetworkConnectionToWebProcess&, NetworkProcess&, NetworkResourceLoadParameters&&, CompletionHandler<void(const WebCore::ResourceError&, const WebCore::ResourceResponse&)>&&);
 
 private:
     ~PingLoad();
diff --git a/Source/WebKit/Sources.txt b/Source/WebKit/Sources.txt
index e28a2eb..bf96c86 100644
--- a/Source/WebKit/Sources.txt
+++ b/Source/WebKit/Sources.txt
@@ -37,7 +37,6 @@
 NetworkProcess/NetworkResourceLoadParameters.cpp
 NetworkProcess/NetworkResourceLoadMap.cpp
 NetworkProcess/NetworkResourceLoader.cpp
-NetworkProcess/NetworkSchemeRegistry.cpp
 NetworkProcess/NetworkSession.cpp
 NetworkProcess/NetworkSessionCreationParameters.cpp
 NetworkProcess/NetworkSocketChannel.cpp
diff --git a/Source/WebKit/UIProcess/WebProcessPool.cpp b/Source/WebKit/UIProcess/WebProcessPool.cpp
index e727223..c06d6c6 100644
--- a/Source/WebKit/UIProcess/WebProcessPool.cpp
+++ b/Source/WebKit/UIProcess/WebProcessPool.cpp
@@ -522,6 +522,7 @@
     parameters.urlSchemesRegisteredAsBypassingContentSecurityPolicy = copyToVector(m_schemesToRegisterAsBypassingContentSecurityPolicy);
     parameters.urlSchemesRegisteredAsLocal = copyToVector(m_schemesToRegisterAsLocal);
     parameters.urlSchemesRegisteredAsNoAccess = copyToVector(m_schemesToRegisterAsNoAccess);
+    parameters.urlSchemesRegisteredAsCORSEnabled = copyToVector(m_schemesToRegisterAsCORSEnabled);
     parameters.urlSchemesRegisteredAsCanDisplayOnlyIfCanRequest = copyToVector(m_schemesToRegisterAsCanDisplayOnlyIfCanRequest);
 
 #if ENABLE(INDEXED_DATABASE)
@@ -1529,6 +1530,7 @@
 {
     m_schemesToRegisterAsCORSEnabled.add(urlScheme);
     sendToAllProcesses(Messages::WebProcess::RegisterURLSchemeAsCORSEnabled(urlScheme));
+    sendToNetworkingProcess(Messages::NetworkProcess::RegisterURLSchemeAsCORSEnabled(urlScheme));
 }
 
 void WebProcessPool::registerGlobalURLSchemeAsHavingCustomProtocolHandlers(const String& urlScheme)
diff --git a/Source/WebKit/WebKit.xcodeproj/project.pbxproj b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
index 7582e11..84f96e6 100644
--- a/Source/WebKit/WebKit.xcodeproj/project.pbxproj
+++ b/Source/WebKit/WebKit.xcodeproj/project.pbxproj
@@ -3595,7 +3595,6 @@
 		587743A421C30AD800AE9084 /* HTTPSUpgradeList.db */ = {isa = PBXFileReference; lastKnownFileType = file; name = HTTPSUpgradeList.db; path = DerivedSources/WebKit2/HTTPSUpgradeList.db; sourceTree = BUILT_PRODUCTS_DIR; };
 		58E977DC21C499FE005D92A6 /* NetworkHTTPSUpgradeChecker.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = NetworkHTTPSUpgradeChecker.cpp; sourceTree = "<group>"; };
 		58E977DD21C49A00005D92A6 /* NetworkHTTPSUpgradeChecker.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = NetworkHTTPSUpgradeChecker.h; sourceTree = "<group>"; };
-		5C0A10C1235241A30053E2CA /* NetworkSchemeRegistry.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = NetworkSchemeRegistry.cpp; sourceTree = "<group>"; };
 		5C0B17741E7C879C00E9123C /* NetworkSocketStreamMessageReceiver.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = NetworkSocketStreamMessageReceiver.cpp; path = DerivedSources/WebKit2/NetworkSocketStreamMessageReceiver.cpp; sourceTree = BUILT_PRODUCTS_DIR; };
 		5C0B17751E7C879C00E9123C /* NetworkSocketStreamMessages.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = NetworkSocketStreamMessages.h; path = DerivedSources/WebKit2/NetworkSocketStreamMessages.h; sourceTree = BUILT_PRODUCTS_DIR; };
 		5C0B17761E7C879C00E9123C /* WebSocketStreamMessageReceiver.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = WebSocketStreamMessageReceiver.cpp; path = DerivedSources/WebKit2/WebSocketStreamMessageReceiver.cpp; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -3673,7 +3672,6 @@
 		5C9EF2E721F058F9003BDC56 /* NetworkStorageSessionProvider.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = NetworkStorageSessionProvider.h; sourceTree = "<group>"; };
 		5CA26D7F217ABBB600F97A35 /* WKSafeBrowsingWarning.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = WKSafeBrowsingWarning.mm; sourceTree = "<group>"; };
 		5CA26D80217ABBB600F97A35 /* WKSafeBrowsingWarning.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKSafeBrowsingWarning.h; sourceTree = "<group>"; };
-		5CA2F7472350E15400BE5194 /* NetworkSchemeRegistry.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = NetworkSchemeRegistry.h; sourceTree = "<group>"; };
 		5CA46E7A21F1A23900CE86B4 /* APIHTTPCookieStoreCocoa.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; name = APIHTTPCookieStoreCocoa.mm; path = UIProcess/API/Cocoa/APIHTTPCookieStoreCocoa.mm; sourceTree = SOURCE_ROOT; };
 		5CA98549210BEB5A0057EB6B /* SafeBrowsingWarning.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SafeBrowsingWarning.h; sourceTree = "<group>"; };
 		5CA9854B210BEB730057EB6B /* SafeBrowsingWarningCocoa.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = SafeBrowsingWarningCocoa.mm; sourceTree = "<group>"; };
@@ -6799,8 +6797,6 @@
 				51240EBE220B6947005CFC63 /* NetworkResourceLoadMap.h */,
 				5C1426E51C23F80500D41183 /* NetworkResourceLoadParameters.cpp */,
 				5C1426E61C23F80500D41183 /* NetworkResourceLoadParameters.h */,
-				5C0A10C1235241A30053E2CA /* NetworkSchemeRegistry.cpp */,
-				5CA2F7472350E15400BE5194 /* NetworkSchemeRegistry.h */,
 				532159521DBAE6FC0054AA3C /* NetworkSession.cpp */,
 				5C20CB9E1BB0DD1800895BB1 /* NetworkSession.h */,
 				5C89DF5621AF61FF004645E8 /* NetworkSessionCreationParameters.cpp */,
diff --git a/Source/WebKit/WebProcess/WebProcess.cpp b/Source/WebKit/WebProcess/WebProcess.cpp
index 86129cd..accd337 100644
--- a/Source/WebKit/WebProcess/WebProcess.cpp
+++ b/Source/WebKit/WebProcess/WebProcess.cpp
@@ -370,7 +370,7 @@
         registerURLSchemeAsDisplayIsolated(scheme);
 
     for (auto& scheme : parameters.urlSchemesRegisteredAsCORSEnabled)
-        LegacySchemeRegistry::registerURLSchemeAsCORSEnabled(scheme);
+        registerURLSchemeAsCORSEnabled(scheme);
 
     for (auto& scheme : parameters.urlSchemesRegisteredAsAlwaysRevalidated)
         registerURLSchemeAsAlwaysRevalidated(scheme);
@@ -567,10 +567,9 @@
     LegacySchemeRegistry::registerURLSchemeAsDisplayIsolated(urlScheme);
 }
 
-void WebProcess::registerURLSchemeAsCORSEnabled(const String& urlScheme)
+void WebProcess::registerURLSchemeAsCORSEnabled(const String& urlScheme) const
 {
     LegacySchemeRegistry::registerURLSchemeAsCORSEnabled(urlScheme);
-    ensureNetworkProcessConnection().connection().send(Messages::NetworkConnectionToWebProcess::RegisterURLSchemesAsCORSEnabled({ urlScheme }), 0);
 }
 
 void WebProcess::registerURLSchemeAsAlwaysRevalidated(const String& urlScheme) const
@@ -1181,7 +1180,6 @@
 #if HAVE(AUDIT_TOKEN)
         m_networkProcessConnection->setNetworkProcessAuditToken(WTFMove(connectionInfo.auditToken));
 #endif
-        m_networkProcessConnection->connection().send(Messages::NetworkConnectionToWebProcess::RegisterURLSchemesAsCORSEnabled(WebCore::LegacySchemeRegistry::allURLSchemesRegisteredAsCORSEnabled()), 0);
     }
     
     return *m_networkProcessConnection;
diff --git a/Source/WebKit/WebProcess/WebProcess.h b/Source/WebKit/WebProcess/WebProcess.h
index 12d05f4..798d086 100644
--- a/Source/WebKit/WebProcess/WebProcess.h
+++ b/Source/WebKit/WebProcess/WebProcess.h
@@ -327,7 +327,7 @@
     void registerURLSchemeAsLocal(const String&) const;
     void registerURLSchemeAsNoAccess(const String&) const;
     void registerURLSchemeAsDisplayIsolated(const String&) const;
-    void registerURLSchemeAsCORSEnabled(const String&);
+    void registerURLSchemeAsCORSEnabled(const String&) const;
     void registerURLSchemeAsAlwaysRevalidated(const String&) const;
     void registerURLSchemeAsCachePartitioned(const String&) const;
     void registerURLSchemeAsCanDisplayOnlyIfCanRequest(const String&) const;