Provided batched input delivery with a BufferedInputRouter

content/browser/renderer_host/input/input_router.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_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_H_
 
 #include "base/basictypes.h"
 #include "content/port/browser/event_with_latency_info.h"
 #include "content/port/common/input_event_ack_state.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ipc/ipc_listener.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
 namespace content {
 
 class InputRouterClient;
 
 // The InputRouter allows the embedder to customize how input events are
 // sent to the renderer, and how responses are dispatched to the browser.
 // While the router should respect the relative order in which events are
 // received, it is free to customize when those events are dispatched.
 class InputRouter : public IPC::Listener {
  public:
   virtual ~InputRouter() {}
 
+  // Should be called only in response to |SetNeedsFlush| requests made via
+  // the |InputRouterClient|.
+  virtual void Flush() = 0;
+
   // Send and take ownership of the the given InputMsg_*. This should be used
   // only for event types not associated with a WebInputEvent.  Returns true on
   // success and false otherwise.
-  virtual bool SendInput(IPC::Message* message) = 0;
+  virtual bool SendInput(scoped_ptr<IPC::Message> message) = 0;
 
   // WebInputEvents
   virtual void SendMouseEvent(
       const MouseEventWithLatencyInfo& mouse_event) = 0;
   virtual void SendWheelEvent(
       const MouseWheelEventWithLatencyInfo& wheel_event) = 0;
   virtual void SendKeyboardEvent(
       const NativeWebKeyboardEvent& key_event,
       const ui::LatencyInfo& latency_info) = 0;
   virtual void SendGestureEvent(
@@ skipping 20 matching lines @@
   virtual bool ShouldForwardGestureEvent(
       const GestureEventWithLatencyInfo& gesture_event) const = 0;
 
   // Returns |true| if the router has any queued or in-flight gesture events.
   virtual bool HasQueuedGestureEvents() const = 0;
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_H_