Move TraceEvent.h from platform/ to wtf/

Source/platform/ThreadTimers.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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
@@ skipping 12 matching lines @@
  * (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 "platform/ThreadTimers.h"
 
 #include "platform/SharedTimer.h"
 #include "platform/PlatformThreadData.h"
 #include "platform/Timer.h"
-#include "platform/TraceEvent.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/MainThread.h"
+#include "wtf/TraceEvent.h"
 
 using namespace std;
 
 namespace WebCore {
 
 // Fire timers for this length of time, and then quit to let the run loop process user input events.
 // 100ms is about a perceptable delay in UI, so use a half of that as a threshold.
 // This is to prevent UI freeze when there are too many timers or machine performance is low.
 static const double maxDurationOfFiringTimers = 0.050;
 
@@ skipping 103 matching lines @@
 
 void ThreadTimers::fireTimersInNestedEventLoop()
 {
     // Reset the reentrancy guard so the timers can fire again.
     m_firingTimers = false;
     updateSharedTimer();
 }
 
 } // namespace WebCore