Send input event's LatencyInfo back from renderer to browser when acked

content/renderer/gpu/input_event_filter.h

Index: content/renderer/gpu/input_event_filter.h
diff --git a/content/renderer/gpu/input_event_filter.h b/content/renderer/gpu/input_event_filter.h
index 4a5d410c4c23b7fef8be2d8b70a568c18dae0eb5..b4526200c2f2685863ee62f5c06fe47c94c6e3bf 100644
--- a/content/renderer/gpu/input_event_filter.h
+++ b/content/renderer/gpu/input_event_filter.h
@@ -56,18 +56,16 @@ class CONTENT_EXPORT InputEventFilter
   virtual void OnChannelClosing() OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
-  // Expects a InputMsg_HandleInputEvent message.
-  static const WebKit::WebInputEvent* CrackMessage(
-      const IPC::Message& message,
-      ui::LatencyInfo* latency_info);
-
  private:
   friend class IPC::ChannelProxy::MessageFilter;
   virtual ~InputEventFilter();
 
   void ForwardToMainListener(const IPC::Message& message);
   void ForwardToHandler(const IPC::Message& message);
-  void SendACK(const IPC::Message& message, InputEventAckState ack_result);
+  void SendACK(WebKit::WebInputEvent::Type type,
+               InputEventAckState ack_result,
+               const ui::LatencyInfo& latency_info,
+               int routing_id);
   void SendMessageOnIOThread(const IPC::Message& message);
 
   scoped_refptr<base::MessageLoopProxy> main_loop_;