Clear pending events upon main frame navigation

content/browser/renderer_host/input/input_router_impl.h

Index: content/browser/renderer_host/input/input_router_impl.h
diff --git a/content/browser/renderer_host/input/input_router_impl.h b/content/browser/renderer_host/input/input_router_impl.h
index 2b00c12996f3c5af280812bebed24ef1643c26bf..5916365aa4097913177e260afd21a35b4047dfe3 100644
--- a/content/browser/renderer_host/input/input_router_impl.h
+++ b/content/browser/renderer_host/input/input_router_impl.h
@@ -56,7 +56,6 @@ class CONTENT_EXPORT InputRouterImpl
   ~InputRouterImpl() override;
 
   // InputRouter
-  void Flush() override;
   bool SendInput(scoped_ptr<IPC::Message> message) override;
   void SendMouseEvent(const MouseEventWithLatencyInfo& mouse_event) override;
   void SendWheelEvent(
@@ -67,6 +66,7 @@ class CONTENT_EXPORT InputRouterImpl
   void SendGestureEvent(
       const GestureEventWithLatencyInfo& gesture_event) override;
   void SendTouchEvent(const TouchEventWithLatencyInfo& touch_event) override;
+  void RequestFlushedNotification() override;
   const NativeWebKeyboardEvent* GetLastKeyboardEvent() const override;
   bool ShouldForwardTouchEvent() const override;
   void OnViewUpdated(int view_flags) override;
@@ -269,6 +269,11 @@ private:
   // to the client_ after all events have been dispatched/acked.
   bool flush_requested_;
 
+  // Whether we're in the scope of destruction. The only input events that might
+  // conceivably arrive when this is true are gesture events generated from
+  // flushing |touch_event_queue_|, which will be summarily dropped.
+  bool in_shutdown_;
+
   TouchEventQueue touch_event_queue_;
   GestureEventQueue gesture_event_queue_;
   TouchActionFilter touch_action_filter_;