Support InputRouter recycling

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 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_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 344 matching lines @@
     return input_method_active_;
   }
 
   // Whether forwarded WebInputEvents should be ignored.  True if either
   // |ignore_input_events_| or |process_->IgnoreInputEvents()| is true.
   bool IgnoreInputEvents() const;
 
   // Event queries delegated to the |input_router_|.
   bool ShouldForwardTouchEvent() const;
 
-  bool has_touch_handler() const { return has_touch_handler_; }
-
   // Notification that the user has made some kind of input that could
   // perform an action. See OnUserGesture for more details.
   void StartUserGesture();
 
   // Set the RenderView background transparency.
   void SetBackgroundOpaque(bool opaque);
 
   // Notifies the renderer that the next key event is bound to one or more
   // pre-defined edit commands
   void SetEditCommandsForNextKeyEvent(
@@ skipping 49 matching lines @@
 
   void DetachDelegate();
 
   // Update the renderer's cache of the screen rect of the view and window.
   void SendScreenRects();
 
   // Suppreses future char events until a keydown. See
   // suppress_next_char_events_.
   void SuppressNextCharEvents();
 
-  // Called by RenderWidgetHostView in response to OnSetNeedsFlushInput.
+  // Called by the view in response to flush requests.
   void FlushInput();
 
-  // InputRouterClient
-  virtual void SetNeedsFlush() override;
+  // Request a flush from the view.
+  void SetNeedsFlush();
 
   // Indicates whether the renderer drives the RenderWidgetHosts's size or the
   // other way around.
   bool should_auto_resize() { return should_auto_resize_; }
 
   void ComputeTouchLatency(const ui::LatencyInfo& latency_info);
   void FrameSwapped(const ui::LatencyInfo& latency_info);
   void DidReceiveRendererFrame();
 
   // Returns the ID that uniquely describes this component to the latency
@@ skipping 190 matching lines @@
   // Give key press listeners a chance to handle this key press. This allow
   // widgets that don't have focus to still handle key presses.
   bool KeyPressListenersHandleEvent(const NativeWebKeyboardEvent& event);
 
   // InputRouterClient
   virtual InputEventAckState FilterInputEvent(
       const blink::WebInputEvent& event,
       const ui::LatencyInfo& latency_info) override;
   virtual void IncrementInFlightEventCount() override;
   virtual void DecrementInFlightEventCount() override;
-  virtual void OnHasTouchEventHandlers(bool has_handlers) override;
   virtual void DidFlush() override;
   virtual void DidOverscroll(const DidOverscrollParams& params) override;
 
   // InputAckHandler
   virtual void OnKeyboardEventAck(const NativeWebKeyboardEvent& event,
                                   InputEventAckState ack_result) override;
   virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
                                InputEventAckState ack_result) override;
   virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
                                InputEventAckState ack_result) override;
@@ skipping 150 matching lines @@
   // For example, pressing alt-2 may let the browser switch to the second tab,
   // but the Char event generated by alt-2 may also activate a HTML element
   // if its accesskey happens to be "2", then the user may get confused when
   // switching back to the original tab, because the content may already be
   // changed.
   bool suppress_next_char_events_;
 
   bool pending_mouse_lock_request_;
   bool allow_privileged_mouse_lock_;
 
-  // Keeps track of whether the webpage has any touch event handler. If it does,
-  // then touch events are sent to the renderer. Otherwise, the touch events are
-  // not sent to the renderer.
-  bool has_touch_handler_;
-
   scoped_ptr<SyntheticGestureController> synthetic_gesture_controller_;
 
   scoped_ptr<TouchEmulator> touch_emulator_;
 
   // Receives and handles all input events.
   scoped_ptr<InputRouter> input_router_;
 
   scoped_ptr<TimeoutMonitor> hang_monitor_timeout_;
 
 #if defined(OS_WIN)
@@ skipping 10 matching lines @@
   cc::RollingTimeDeltaHistory browser_composite_latency_history_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_