Removed deprecated navigator.webkitGetGamepads.

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 253 matching lines @@
         HTMLMediaElementSeekToFragmentStart = 281,
         HTMLMediaElementPauseAtFragmentEnd = 282,
         PrefixedWindowURL = 283,
         PrefixedWorkerURL = 284, // This didn't work because of crbug.com/376039. Available since M37.
         WindowOrientation = 285,
         DOMStringListContains = 286,
         DocumentCaptureEvents = 287,
         DocumentReleaseEvents = 288,
         WindowCaptureEvents = 289,
         WindowReleaseEvents = 290,
-        PrefixedGamepad = 291,
         ElementAnimateKeyframeListEffectObjectTiming = 292,
         ElementAnimateKeyframeListEffectDoubleTiming = 293,
         ElementAnimateKeyframeListEffectNoTiming = 294,
         DocumentXPathCreateExpression = 295,
         DocumentXPathCreateNSResolver = 296,
         DocumentXPathEvaluate = 297,
         AttrGetValue = 298,
         AttrSetValue = 299,
         AnimationConstructorKeyframeListEffectObjectTiming = 300,
         AnimationConstructorKeyframeListEffectDoubleTiming = 301,
@@ skipping 351 matching lines @@
 
     void updateMeasurements();
 
     OwnPtr<BitVector> m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h