Adding monotonic only API to Blink's animation delegate interface

Source/core/rendering/compositing/RenderLayerCompositor.h

 /*
  * 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 219 matching lines @@
         // Counter that tracks what index the next RenderLayer would be if it gets squashed to the current squashing layer.
         size_t nextSquashedLayerIndex;
     };
 
     CompositingStateTransitionType computeCompositedLayerUpdate(const RenderLayer*);
     // Make updates to the layer based on viewport-constrained properties such as position:fixed. This can in turn affect
     // compositing.
     bool updateLayerIfViewportConstrained(RenderLayer*);
 
     // GraphicsLayerClient implementation
-    virtual void notifyAnimationStarted(const GraphicsLayer*, double, double) OVERRIDE { }
+    virtual void notifyAnimationStarted(const GraphicsLayer*, double) OVERRIDE { }
     virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect&) OVERRIDE;
 
     virtual bool isTrackingRepaints() const OVERRIDE;
 
     // Whether the given RL needs to paint into its own separate backing (and hence would need its own CompositedLayerMapping).
     bool needsOwnBacking(const RenderLayer*) const;
     // Whether the layer could ever be composited.
     bool canBeComposited(const RenderLayer*) const;
 
     void updateDirectCompositingReasons(RenderLayer*);
@@ skipping 121 matching lines @@
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 #if USE(RUBBER_BANDING)
     OwnPtr<GraphicsLayer> m_layerForOverhangShadow;
 #endif
 };
 
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h