DevTools: make console.timeline/timelineEnd work for tracing based Timeline

Source/core/frame/ConsoleBase.cpp

 /*
  * Copyright (C) 2007 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
@@ skipping 164 matching lines @@
     reportMessageToConsole(consoleMessage.release());
 }
 
 void ConsoleBase::timeStamp(const String& title)
 {
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "TimeStamp", "data", InspectorTimeStampEvent::data(context(), title));
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::consoleTimeStamp(context(), title);
 }
 
+static String formatTimelineTitle(const String& title)
+{
+    return String::format("Timeline '%s'", title.utf8().data());
+}
+
 void ConsoleBase::timeline(ScriptState* scriptState, const String& title)
 {
+    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::consoleTimeline(context(), title, scriptState);
+
+    TRACE_EVENT_COPY_ASYNC_BEGIN0("blink.console", formatTimelineTitle(title).utf8().data(), this);
 }
 
 void ConsoleBase::timelineEnd(ScriptState* scriptState, const String& title)
 {
+    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentation::consoleTimelineEnd(context(), title, scriptState);
+
+    TRACE_EVENT_COPY_ASYNC_END0("blink.console", formatTimelineTitle(title).utf8().data(), this);
 }
 
 void ConsoleBase::group(ScriptState* scriptState, PassRefPtrWillBeRawPtr<ScriptArguments> arguments)
 {
     internalAddMessage(StartGroupMessageType, LogMessageLevel, scriptState, arguments, true);
 }
 
 void ConsoleBase::groupCollapsed(ScriptState* scriptState, PassRefPtrWillBeRawPtr<ScriptArguments> arguments)
 {
     internalAddMessage(StartGroupCollapsedMessageType, LogMessageLevel, scriptState, arguments, true);
@@ skipping 17 matching lines @@
     consoleMessage->setType(type);
     consoleMessage->setScriptState(scriptState);
     consoleMessage->setScriptArguments(arguments);
 
     size_t stackSize = printTrace ? ScriptCallStack::maxCallStackSizeToCapture : 1;
     consoleMessage->setCallStack(createScriptCallStackForConsole(stackSize));
     reportMessageToConsole(consoleMessage.release());
 }
 
 } // namespace blink