Move page scale animation from LayerTreeHostImpl to LayerTreeImpl

cc/input/input_handler.h

Index: cc/input/input_handler.h
diff --git a/cc/input/input_handler.h b/cc/input/input_handler.h
index 880c20877120235ab9f3dcaaa364cf2cc982c854..b3205a8a6485bbe9839c7d621beb39ae15c83d31 100644
--- a/cc/input/input_handler.h
+++ b/cc/input/input_handler.h
@@ -123,11 +123,6 @@ class CC_EXPORT InputHandler {
                                   const gfx::Point& anchor) = 0;
   virtual void PinchGestureEnd() = 0;
 
-  virtual void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
-                                       bool anchor_point,
-                                       float page_scale,
-                                       base::TimeDelta duration) = 0;
-
   // Request another callback to InputHandlerClient::Animate().
   virtual void SetNeedsAnimate() = 0;