Revert of Revert of Early terminate flings when scrolling impossible

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 fda17cdeee35f6fb8560104a42f2556a94b21b13..b26934548b9454e1252a80a30f0af39252f6b5f3 100644
--- a/cc/input/input_handler.h
+++ b/cc/input/input_handler.h
@@ -24,12 +24,6 @@
 
 class LayerScrollOffsetDelegate;
 
-struct DidOverscrollParams {
-  gfx::Vector2dF accumulated_overscroll;
-  gfx::Vector2dF latest_overscroll_delta;
-  gfx::Vector2dF current_fling_velocity;
-};
-
 class CC_EXPORT InputHandlerClient {
  public:
   virtual ~InputHandlerClient() {}
@@ -41,7 +35,8 @@
   // Called when scroll deltas reaching the root scrolling layer go unused.
   // The accumulated overscroll is scoped by the most recent call to
   // InputHandler::ScrollBegin.
-  virtual void DidOverscroll(const DidOverscrollParams& params) = 0;
+  virtual void DidOverscroll(const gfx::Vector2dF& accumulated_overscroll,
+                             const gfx::Vector2dF& latest_overscroll_delta) = 0;
 
  protected:
   InputHandlerClient() {}
@@ -94,8 +89,6 @@
   // ScrollIgnored if not.
   virtual ScrollStatus FlingScrollBegin() = 0;
 
-  virtual void NotifyCurrentFlingVelocity(const gfx::Vector2dF& velocity) = 0;
-
   virtual void MouseMoveAt(const gfx::Point& mouse_position) = 0;
 
   // Stop scrolling the selected layer. Should only be called if ScrollBegin()