Remove all fling related stuff from the renderer assuming that browser side

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 00446b55bb4afa924fea7475ad4c5818a615aea4..cd37edfa27a933777104f2ae3ec2c2ae5d4ee3ca 100644
--- a/cc/input/input_handler.h
+++ b/cc/input/input_handler.h
@@ -26,7 +26,6 @@ class LayerScrollOffsetDelegate;
 struct DidOverscrollParams {
   gfx::Vector2dF accumulated_overscroll;
   gfx::Vector2dF latest_overscroll_delta;
-  gfx::Vector2dF current_fling_velocity;
 };
 
 class CC_EXPORT InputHandlerClient {
@@ -35,7 +34,6 @@ class CC_EXPORT InputHandlerClient {
 
   virtual void WillShutdown() = 0;
   virtual void Animate(base::TimeTicks time) = 0;
-  virtual void MainThreadHasStoppedFlinging() = 0;
 
   // Called when scroll deltas reaching the root scrolling layer go unused.
   // The accumulated overscroll is scoped by the most recent call to
@@ -90,12 +88,6 @@ class CC_EXPORT InputHandler {
       gfx::Point viewport_point,
       ScrollDirection direction) = 0;
 
-  // Returns ScrollStarted if a layer was being actively being scrolled,
-  // ScrollIgnored if not.
-  virtual ScrollStatus FlingScrollBegin() = 0;
-
-  virtual void NotifyCurrentFlingVelocity(gfx::Vector2dF velocity) = 0;
-
   virtual void MouseMoveAt(gfx::Point mouse_position) = 0;
 
   // Stop scrolling the selected layer. Should only be called if ScrollBegin()