Add a mojo channel for frame messages.

content/renderer/render_widget.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_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 410 matching lines @@
 
   InputEventAckState HandleInputEvent(
       const blink::WebCoalescedInputEvent& input_event,
       const ui::LatencyInfo& latency_info,
       InputEventDispatchType dispatch_type) override;
 
   void SendInputEventAck(blink::WebInputEvent::Type type,
                          InputEventAckState ack_result,
                          uint32_t touch_event_id) override;
 
+  scoped_refptr<MainThreadEventQueue> GetInputEventQueue();
+
  protected:
   // Friend RefCounted so that the dtor can be non-public. Using this class
   // without ref-counting is an error.
   friend class base::RefCounted<RenderWidget>;
 
   // For unit tests.
   friend class RenderWidgetTest;
 
   enum ResizeAck {
     SEND_RESIZE_ACK,
@@ skipping 446 matching lines @@
   scoped_refptr<MainThreadEventQueue> input_event_queue_;
 
   base::WeakPtrFactory<RenderWidget> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_