Make touch events uncancelable during fling when they are on the current active scroll layer

content/renderer/input/input_event_filter.h

Index: content/renderer/input/input_event_filter.h
diff --git a/content/renderer/input/input_event_filter.h b/content/renderer/input/input_event_filter.h
index 320a9d1e550ce313fe6b3894c6017206cdf14230..640a4b14368333e452e18bf4ce6783d1a661ebc6 100644
--- a/content/renderer/input/input_event_filter.h
+++ b/content/renderer/input/input_event_filter.h
@@ -67,7 +67,6 @@ class CONTENT_EXPORT InputEventFilter : public InputHandlerManagerClient,
   void UnregisterRoutingID(int routing_id) override;
   void DidOverscroll(int routing_id,
                      const ui::DidOverscrollParams& params) override;
-  void DidStartFlinging(int routing_id) override;
   void DidStopFlinging(int routing_id) override;
   void DispatchNonBlockingEventToMainThread(
       int routing_id,
@@ -114,7 +113,6 @@ class CONTENT_EXPORT InputEventFilter : public InputHandlerManagerClient,
       std::unique_ptr<ui::DidOverscrollParams> overscroll_params);
   void SendMessage(std::unique_ptr<IPC::Message> message);
   void SendMessageOnIOThread(std::unique_ptr<IPC::Message> message);
-  void SetIsFlingingInMainThreadEventQueue(int routing_id, bool is_flinging);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
   base::Callback<void(const IPC::Message&)> main_listener_;