Revert of Add UseCounters for non-standard, internally unused reflected attributes

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 465 matching lines @@
         ProgressElement = 484,
         VideoFullscreenAllowedExemption = 485,
         WebKitPoint = 488,
         HTMLPreElementWidth = 489,
         PrefixedHTMLElementDropzone = 490,
         WheelEventWheelDeltaX = 491,
         WheelEventWheelDeltaY = 492,
         WheelEventWheelDelta = 493,
         SendBeacon = 494,
         SendBeaconQuotaExceeded = 495,
-        HTMLHtmlElementVersion = 496,
-        HTMLMetaElementScheme = 497,
-        HTMLObjectElementStandby = 498,
-        HTMLTableCellElementChar = 499,
-        HTMLTableCellElementCharOff = 500,
         SVGSMILElementInDocument = 501,
         MouseEventOffsetX = 502,
         MouseEventOffsetY = 503,
         MouseEventX = 504,
         MouseEventY = 505,
         MouseEventFromElement = 506,
         MouseEventToElement = 507,
         // 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/
@@ skipping 57 matching lines @@
 
     void updateMeasurements();
 
     OwnPtr<BitVector> m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h