Adding monotonic only API to Blink's animation delegate interface

Source/web/tests/GraphicsLayerTest.cpp

 /*
  * 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 30 matching lines @@
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebUnitTestSupport.h"
 
 using namespace WebCore;
 using namespace blink;
 
 namespace {
 
 class MockGraphicsLayerClient : public GraphicsLayerClient {
 public:
-    virtual void notifyAnimationStarted(const GraphicsLayer*, double wallClockTime, double monotonicTime) OVERRIDE { }
+    virtual void notifyAnimationStarted(const GraphicsLayer*, double monotonicTime) OVERRIDE { }
     virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) OVERRIDE { }
     virtual String debugName(const GraphicsLayer*) OVERRIDE { return String(); }
 };
 
 class GraphicsLayerForTesting : public GraphicsLayer {
 public:
     explicit GraphicsLayerForTesting(GraphicsLayerClient* client)
         : GraphicsLayer(client) { };
 
     virtual blink::WebLayer* contentsLayer() const { return GraphicsLayer::contentsLayer(); }
@@ skipping 97 matching lines @@
     m_graphicsLayer->setScrollableArea(&scrollableArea, false);
 
     WebPoint scrollPosition(7, 9);
     m_platformLayer->setScrollPosition(scrollPosition);
     m_graphicsLayer->didScroll();
 
     EXPECT_EQ(scrollPosition, WebPoint(scrollableArea.scrollPosition()));
 }
 
 } // namespace