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

cc/input/layer_scroll_offset_delegate.h

Index: cc/input/layer_scroll_offset_delegate.h
diff --git a/cc/input/layer_scroll_offset_delegate.h b/cc/input/layer_scroll_offset_delegate.h
index 54a11c9e2bd6ba4e1c37f615714b1e5c2ba51153..054a0fc1b84918fcabeee1251b196075c7f799f3 100644
--- a/cc/input/layer_scroll_offset_delegate.h
+++ b/cc/input/layer_scroll_offset_delegate.h
@@ -34,10 +34,6 @@ class LayerScrollOffsetDelegate {
   // more than the value passed to the most recent SetMaxScrollOffset call.
   virtual gfx::Vector2dF GetTotalScrollOffset() = 0;
 
-  // This is called by the compositor to check whether a delegate-managed fling
-  // is active or not.
-  virtual bool IsExternalFlingActive() const = 0;
-
   // This is called by the compositor to notify the delegate what is the current
   // page scale factor is.
   virtual void SetTotalPageScaleFactor(float page_scale_factor) = 0;