Clear pending events upon main frame navigation

content/browser/renderer_host/input/input_router_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
@@ skipping 38 matching lines @@
   };
 
   InputRouterImpl(IPC::Sender* sender,
                   InputRouterClient* client,
                   InputAckHandler* ack_handler,
                   int routing_id,
                   const Config& config);
   ~InputRouterImpl() override;
 
   // InputRouter
-  void Flush() override;
   bool SendInput(scoped_ptr<IPC::Message> message) override;
   void SendMouseEvent(const MouseEventWithLatencyInfo& mouse_event) override;
   void SendWheelEvent(
       const MouseWheelEventWithLatencyInfo& wheel_event) override;
   void SendKeyboardEvent(const NativeWebKeyboardEvent& key_event,
                          const ui::LatencyInfo& latency_info,
                          bool is_keyboard_shortcut) override;
   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;
   bool HasPendingEvents() const override;
 
   // IPC::Listener
   bool OnMessageReceived(const IPC::Message& message) override;
 
 private:
   friend class InputRouterImplTest;
@@ skipping 182 matching lines @@
   int current_view_flags_;
 
   // The source of the ack within the scope of |ProcessInputEventAck()|.
   // Defaults to ACK_SOURCE_NONE.
   AckSource current_ack_source_;
 
   // Whether a call to |Flush()| has yet been accompanied by a |DidFlush()| call
   // 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_;
   InputEventStreamValidator input_stream_validator_;
   InputEventStreamValidator output_stream_validator_;
 
   DISALLOW_COPY_AND_ASSIGN(InputRouterImpl);
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_