Move UIEvent.pageX/pageY/layerX/layerY to MouseEvent

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 415 matching lines @@
         SVGSMILElementInDocument = 501,
         MouseEventOffsetX = 502,
         MouseEventOffsetY = 503,
         MouseEventX = 504,
         MouseEventY = 505,
         MouseEventFromElement = 506,
         MouseEventToElement = 507,
         RequestFileSystem = 508,
         RequestFileSystemWorker = 509,
         RequestFileSystemSyncWorker = 510,
-        UIEventLayerX = 511,
-        UIEventLayerY = 512,
-        UIEventPageX = 513,
-        UIEventPageY = 514,
         DevToolsConsoleProfile = 518,
         SVGStyleElementTitle = 519,
         PictureSourceSrc = 520,
         // The above items are available in M38 branch.
 
         Picture = 521,
         Sizes = 522,
         SrcsetXDescriptor = 523,
         SrcsetWDescriptor = 524,
         SelectionContainsNode = 525,
@@ skipping 302 matching lines @@
         DOMStringList_Contains_Method_IndexedDB = 848,
         DOMStringList_Contains_Method_Location = 849,
         NavigatorVibrate = 850,
         NavigatorVibrateSubFrame = 851,
         PermissionStatusStatus = 852,
         V8XPathEvaluator_Constructor = 853,
         V8XPathEvaluator_CreateExpression_Method = 854,
         V8XPathEvaluator_CreateNSResolver_Method = 855,
         V8XPathEvaluator_Evaluate_Method = 856,
         RequestMIDIAccess = 857,
+        V8MouseEvent_LayerX_AttributeGetter = 858,
+        V8MouseEvent_LayerY_AttributeGetter = 859,
 
         // 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 83 matching lines @@
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h