Moving platform tracing things into platform/tracing.

third_party/WebKit/Source/core/frame/UseCounter.cpp

 /*
  * Copyright (C) 2012 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 18 matching lines @@
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/Deprecation.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/LocalFrame.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "platform/Histogram.h"
-#include "platform/TraceEvent.h"
+#include "platform/tracing/TraceEvent.h"
 
 namespace {
 
 int totalPagesMeasuredCSSSampleId() {
   return 1;
 }
 
 // Make sure update_use_counter_css.py was run which updates histograms.xml.
 constexpr int kMaximumCSSSampleId = 545;
 
@@ skipping 1287 matching lines @@
     }
   }
 
   if (needsPagesMeasuredUpdate)
     cssPropertiesHistogram.count(totalPagesMeasuredCSSSampleId());
 
   m_CSSBits.clearAll();
 }
 
 }  // namespace blink