Drop support for NSURLCache callbacks in NetworkProcess
https://bugs.webkit.org/show_bug.cgi?id=203344

Patch by Benjamin Nham <nham@apple.com> on 2019-12-06
Reviewed by Alex Christensen.

Remove the NSURLSession caching policy callback in NetworkProcess. It's no longer necessary since
we don't use NSURLCache in NetworkProcess (https://bugs.webkit.org/show_bug.cgi?id=185990).

* NetworkProcess/cocoa/NetworkSessionCocoa.mm:
(-[WKNetworkSessionDelegate URLSession:dataTask:willCacheResponse:completionHandler:]): Deleted.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@253212 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
index 282ed1b..0d858cd 100644
--- a/Source/WebKit/ChangeLog
+++ b/Source/WebKit/ChangeLog
@@ -1,3 +1,16 @@
+2019-12-06  Benjamin Nham  <nham@apple.com>
+
+        Drop support for NSURLCache callbacks in NetworkProcess
+        https://bugs.webkit.org/show_bug.cgi?id=203344
+
+        Reviewed by Alex Christensen.
+
+        Remove the NSURLSession caching policy callback in NetworkProcess. It's no longer necessary since
+        we don't use NSURLCache in NetworkProcess (https://bugs.webkit.org/show_bug.cgi?id=185990).
+
+        * NetworkProcess/cocoa/NetworkSessionCocoa.mm:
+        (-[WKNetworkSessionDelegate URLSession:dataTask:willCacheResponse:completionHandler:]): Deleted.
+
 2019-12-05  Chris Dumez  <cdumez@apple.com>
 
         Stop using reserveCapacity() / reserveInitialCapacity() in IPC decoders
diff --git a/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm b/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
index 3a5bd20..c2aa6f0 100644
--- a/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
+++ b/Source/WebKit/NetworkProcess/cocoa/NetworkSessionCocoa.mm
@@ -594,16 +594,6 @@
     }
 }
 
-- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask willCacheResponse:(NSCachedURLResponse *)proposedResponse completionHandler:(void (^)(NSCachedURLResponse *cachedResponse))completionHandler
-{
-    // FIXME: remove if <rdar://problem/20001985> is ever resolved.
-    if ([proposedResponse.response respondsToSelector:@selector(allHeaderFields)]
-        && [[(id)proposedResponse.response allHeaderFields] objectForKey:@"Content-Range"])
-        completionHandler(nil);
-    else
-        completionHandler(proposedResponse);
-}
-
 #if HAVE(CFNETWORK_NSURLSESSION_STRICTRUSTEVALUATE)
 static inline void processServerTrustEvaluation(NetworkSessionCocoa *session, SessionWrapper& sessionWrapper, NSURLAuthenticationChallenge *challenge, NetworkDataTaskCocoa::TaskIdentifier taskIdentifier, NetworkDataTaskCocoa* networkDataTask, CompletionHandler<void(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential)>&& completionHandler)
 {