Add UseCounters for ViewportAPI

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 1243 matching lines @@
 
         TouchStartFired = 1450,
         MouseDownFired = 1451,
         PointerDownFired= 1452,
         PointerDownFiredForTouch = 1453,
         PointerEventDispatchPointerDown = 1454,
         SVGSMILBeginOrEndEventValue = 1455,
         SVGSMILBeginOrEndSyncbaseValue = 1456,
         SVGSMILElementInsertedAfterLoad = 1457,
 
+        V8VisualViewport_ScrollLeft_AttributeGetter = 1458,
+        V8VisualViewport_ScrollTop_AttributeGetter = 1459,
+        V8VisualViewport_PageX_AttributeGetter = 1460,
+        V8VisualViewport_PageY_AttributeGetter = 1461,
+        V8VisualViewport_ClientWidth_AttributeGetter = 1462,
+        V8VisualViewport_ClientHeight_AttributeGetter = 1463,
+        V8VisualViewport_Scale_AttributeGetter = 1464,
+        VisualViewportScrollFired = 1465,
+        VisualViewportResizeFired = 1466,
+
         // 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);
     static void count(const Document&, Feature);
@@ skipping 73 matching lines @@
     friend class UseCounterTest;
     static int m_muteCount;
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h