Remove is_fling flag for fling intervention

content/renderer/input/input_handler_wrapper.cc

Index: content/renderer/input/input_handler_wrapper.cc
diff --git a/content/renderer/input/input_handler_wrapper.cc b/content/renderer/input/input_handler_wrapper.cc
index 49efe6c5f3398421f1704f8ff0e04ad5b0ddb422..e3052d7aed0c887e5f5a6943360dadcdd6e23f8a 100644
--- a/content/renderer/input/input_handler_wrapper.cc
+++ b/content/renderer/input/input_handler_wrapper.cc
@@ -61,7 +61,6 @@ blink::WebGestureCurve* InputHandlerWrapper::CreateFlingAnimationCurve(
     blink::WebGestureDevice deviceSource,
     const blink::WebFloatPoint& velocity,
     const blink::WebSize& cumulative_scroll) {
-  DidStartFlinging();
   return blink::Platform::current()->createFlingAnimationCurve(
       deviceSource, velocity, cumulative_scroll);
 }
@@ -79,10 +78,6 @@ void InputHandlerWrapper::DidOverscroll(
   input_handler_manager_->DidOverscroll(routing_id_, params);
 }
 
-void InputHandlerWrapper::DidStartFlinging() {
-  input_handler_manager_->DidStartFlinging(routing_id_);
-}
-
 void InputHandlerWrapper::DidStopFlinging() {
   input_handler_manager_->DidStopFlinging(routing_id_);
 }