Stop exposing --disable-gpu-compositing as a Blink RuntimeEnabledFeature

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 86 matching lines @@
 }
 
 void WebRuntimeFeatures::forceDisable2dCanvasCopyOnWrite(bool enable) {
   RuntimeEnabledFeatures::setForceDisable2dCanvasCopyOnWriteEnabled(enable);
 }
 
 void WebRuntimeFeatures::enableDisplayList2dCanvas(bool enable) {
   RuntimeEnabledFeatures::setDisplayList2dCanvasEnabled(enable);
 }
 
-void WebRuntimeFeatures::enableGpuCompositing(bool enable) {
-  RuntimeEnabledFeatures::setGpuCompositingEnabled(enable);
-}
-
 void WebRuntimeFeatures::enableCanvas2dDynamicRenderingModeSwitching(
     bool enable) {
   RuntimeEnabledFeatures::setEnableCanvas2dDynamicRenderingModeSwitchingEnabled(
       enable);
 }
 
 void WebRuntimeFeatures::enableDocumentWriteEvaluator(bool enable) {
   RuntimeEnabledFeatures::setDocumentWriteEvaluatorEnabled(enable);
 }
 
@@ skipping 215 matching lines @@
   RuntimeEnabledFeatures::setTimerThrottlingForHiddenFramesEnabled(enable);
 }
 
 void WebRuntimeFeatures::enableSendBeaconThrowForBlobWithNonSimpleType(
     bool enable) {
   RuntimeEnabledFeatures::setSendBeaconThrowForBlobWithNonSimpleTypeEnabled(
       enable);
 }
 
 }  // namespace blink