[NOT FOR REVIEW] Patch demonstrating the changes required for browser side fling.

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index ede47194937e0a1eb381f73f543bea680853edd0..2ec57af6cae1d9566a5d6297c465c146af14813f 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -1001,11 +1001,6 @@ void LayerImpl::SetScrollOffsetDelegate(
   }
 }
 
-bool LayerImpl::IsExternalFlingActive() const {
-  return scroll_offset_delegate_ &&
-         scroll_offset_delegate_->IsExternalFlingActive();
-}
-
 void LayerImpl::SetScrollOffset(gfx::Vector2d scroll_offset) {
   SetScrollOffsetAndDelta(scroll_offset, ScrollDelta());
 }