Add a use counter for Attr.prototype.cloneNode()

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 871 matching lines @@
         CSSFilterDropShadow = 1024,
         BackgroundSyncRegister = 1025,
         BorderImageWithBorderStyleNone = 1026,
         ExecCommandOnInputOrTextarea = 1027,
         V8History_ScrollRestoration_AttributeGetter = 1028,
         V8History_ScrollRestoration_AttributeSetter = 1029,
         SVG1DOMFilter = 1030,
         OfflineAudioContextStartRendering = 1031,
         OfflineAudioContextSuspend = 1032,
         OfflineAudioContextResume = 1033,
+        AttrCloneNode = 1034,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/
         // to update the UMA mapping.
         NumberOfFeatures, // This enum value must be last.
     };
 
     // "count" sets the bit for this feature to 1. Repeated calls are ignored.
     static void count(const Frame*, Feature);
@@ skipping 84 matching lines @@
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h