Consolidate duplicated frame / capability structures in video_capture_types.h

content/browser/renderer_host/media/video_capture_controller_event_handler.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_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
 
 #include "base/memory/shared_memory.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 
 namespace media {
-struct VideoCaptureCapability;
+class VideoCaptureCapability;
 }
 
 namespace content {
 
 // ID used for identifying an object of VideoCaptureController.
 struct CONTENT_EXPORT VideoCaptureControllerID {
   explicit VideoCaptureControllerID(int device_id);
 
   bool operator<(const VideoCaptureControllerID& vc) const;
   bool operator==(const VideoCaptureControllerID& vc) const;
@@ skipping 32 matching lines @@
   // The capture session has ended and no more frames will be sent.
   virtual void OnEnded(const VideoCaptureControllerID& id) = 0;
 
  protected:
   virtual ~VideoCaptureControllerEventHandler() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_