Run smooth scroll animations on the compositor when possible

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple 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 1106 matching lines @@
 void GraphicsLayer::pauseAnimation(int animationId, double timeOffset)
 {
     platformLayer()->pauseAnimation(animationId, timeOffset);
 }
 
 void GraphicsLayer::removeAnimation(int animationId)
 {
     platformLayer()->removeAnimation(animationId);
 }
 
+void GraphicsLayer::abortAnimation(int animationId)
+{
+    platformLayer()->abortAnimation(animationId);
+}
+
 WebLayer* GraphicsLayer::platformLayer() const
 {
     return m_layer->layer();
 }
 
 void GraphicsLayer::setFilters(const FilterOperations& filters)
 {
     SkiaImageFilterBuilder builder;
     OwnPtr<WebFilterOperations> webFilters = adoptPtr(Platform::current()->compositorSupport()->createFilterOperations());
     FilterOutsets outsets = filters.outsets();
@@ skipping 112 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif