Added trace events for blink feature usage

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

 /*
  * 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 1314 matching lines @@
 
     static UseCounter* getFrom(const Document*);
     static UseCounter* getFrom(const CSSStyleSheet*);
     static UseCounter* getFrom(const StyleSheetContents*);
 
     static int mapCSSPropertyIdToCSSSampleIdForHistogram(int id);
 
     void muteForInspector();
     void unmuteForInspector();
 
-    void recordMeasurement(Feature feature)
-    {
-        if (!m_muteCount)
-            m_countBits.recordMeasurement(feature);
-    }
+    void recordMeasurement(Feature);
     void updateMeasurements();
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     class CountBits {
         DISALLOW_NEW();
     public:
         CountBits() : m_bits(NumberOfFeatures) { }
 
         bool hasRecordedMeasurement(Feature feature) const
@@ skipping 22 matching lines @@
     friend class UseCounterTest;
     unsigned m_muteCount;
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h