CC Animation: Remove meaningless method from WebLayer.

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 1101 matching lines @@
     }
 
     setContentsTo(m_imageLayer ? m_imageLayer->layer() : 0);
 }
 
 bool GraphicsLayer::addAnimation(PassOwnPtr<WebCompositorAnimation> popAnimation)
 {
     OwnPtr<WebCompositorAnimation> animation(std::move(popAnimation));
     ASSERT(animation);
     platformLayer()->setAnimationDelegate(this);
-
-    // Remove any existing animations with the same animation id and target property.
-    platformLayer()->removeAnimation(animation->id(), animation->targetProperty());
     return platformLayer()->addAnimation(animation.leakPtr());
 }
 
 void GraphicsLayer::pauseAnimation(int animationId, double timeOffset)
 {
     platformLayer()->pauseAnimation(animationId, timeOffset);
 }
 
 void GraphicsLayer::removeAnimation(int animationId)
 {
@@ skipping 132 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