Make console.timeline/timelineEnd work for Timeline based on trace events

Source/core/inspector/InspectorConsoleAgent.cpp

 /*
  * Copyright (C) 2011 Google 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
@@ skipping 108 matching lines @@
 }
 
 void InspectorConsoleAgent::disable(ErrorString*)
 {
     if (!m_enabled)
         return;
     m_enabled = false;
     if (!(--s_enabledAgentCount))
         ScriptController::setCaptureCallStackForUncaughtExceptions(false);
     m_state->setBoolean(ConsoleAgentState::consoleMessagesEnabled, false);
+    m_state->setBoolean(ConsoleAgentState::tracingBasedTimeline, false);
 }
 
 void InspectorConsoleAgent::clearMessages(ErrorString*)
 {
     m_consoleMessages.clear();
     m_expiredConsoleMessageCount = 0;
     m_injectedScriptManager->releaseObjectGroup("console");
     if (m_frontend && m_enabled)
         m_frontend->messagesCleared();
 }
@@ skipping 204 matching lines @@
 private:
     int m_heapObjectId;
 };
 
 void InspectorConsoleAgent::addInspectedHeapObject(ErrorString*, int inspectedHeapObjectId)
 {
     m_injectedScriptManager->injectedScriptHost()->addInspectedObject(adoptPtr(new InspectableHeapObject(inspectedHeapObjectId)));
 }
 
 } // namespace blink