Add a UseCounter for execCommand with INPUT or TEXTAREA element.

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 854 matching lines @@
         SelectionAddRange = 1004,
         SelectionRemoveAllRanges = 1005,
         SelectionCollapse = 1006,
         SelectionCollapseToStart = 1007,
         SelectionCollapseToEnd = 1008,
         SelectionExtend = 1009,
         SelectionSelectAllChildren = 1010,
         SelectionDeleteDromDocument = 1011,
         SelectionDOMString = 1012,
         InputTypeRangeVerticalAppearance = 1013,
+        // The above items are available in M48 branch.
+
         CSSFilterReference = 1014,
         CSSFilterGrayscale = 1015,
         CSSFilterSepia = 1016,
         CSSFilterSaturate = 1017,
         CSSFilterHueRotate = 1018,
         CSSFilterInvert = 1019,
         CSSFilterOpacity = 1020,
         CSSFilterBrightness = 1021,
         CSSFilterContrast = 1022,
         CSSFilterBlur = 1023,
         CSSFilterDropShadow = 1024,
         BackgroundSyncRegister = 1025,
         BorderImageWithBorderStyleNone = 1026,
+        ExecCommandOnInputOrTextarea = 1027,
 
         // 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