Add system trace points for process launch and for initializeWebProcess
https://bugs.webkit.org/show_bug.cgi?id=184669

Reviewed by Simon Fraser.

Source/JavaScriptCore:

* runtime/VMEntryScope.cpp:
(JSC::VMEntryScope::VMEntryScope):
(JSC::VMEntryScope::~VMEntryScope):

Source/WebCore:

No testing needed because there is no new functionality here.

* loader/FrameLoader.cpp:
(WebCore::FrameLoader::provisionalLoadStarted):
(WebCore::FrameLoader::checkLoadCompleteForThisFrame):
* loader/SubresourceLoader.cpp:
(WebCore::SubresourceLoader::willSendRequestInternal):
(WebCore::SubresourceLoader::didFinishLoading):
(WebCore::SubresourceLoader::didFail):
(WebCore::SubresourceLoader::didCancel):

Source/WebKit:

* UIProcess/Launcher/ProcessLauncher.cpp:
(WebKit::ProcessLauncher::ProcessLauncher):
(WebKit::ProcessLauncher::didFinishLaunchingProcess):
* WebProcess/WebProcess.cpp:
(WebKit::WebProcess::initializeWebProcess):

Source/WTF:

This patch adds TracePointCodes to measure process launch time and
WebProcess::initializeWebProcess time.

It also renames the TracePoint function to tracePoint since WebKit style
does not capitalize the first letter in function names.

* wtf/SystemTracing.h:
(WTF::tracePoint):
(WTF::TraceScope::TraceScope):
(WTF::TraceScope::~TraceScope):
(WTF::TracePoint): Deleted.

Tools:

* Tracing/SystemTracePoints.plist:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@230711 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/WebCore/loader/FrameLoader.cpp b/Source/WebCore/loader/FrameLoader.cpp
index 9fb15b3..759a4ce 100644
--- a/Source/WebCore/loader/FrameLoader.cpp
+++ b/Source/WebCore/loader/FrameLoader.cpp
@@ -1031,7 +1031,7 @@
     m_client.provisionalLoadStarted();
 
     if (m_frame.isMainFrame()) {
-        TracePoint(MainResourceLoadDidStartProvisional);
+        tracePoint(MainResourceLoadDidStartProvisional);
 
         if (auto* page = m_frame.page())
             page->didStartProvisionalLoad();
@@ -2400,7 +2400,7 @@
             Page* page = m_frame.page();
             if (page) {
                 if (m_frame.isMainFrame()) {
-                    TracePoint(MainResourceLoadDidEnd);
+                    tracePoint(MainResourceLoadDidEnd);
                     page->didFinishLoad();
                 }
             }