Add posciak and wuchengli to WebRTC HW decoder and encoder files

content/renderer/media/gpu/rtc_video_decoder.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_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
-#define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
+#ifndef CONTENT_RENDERER_MEDIA_GPU_RTC_VIDEO_DECODER_H_
+#define CONTENT_RENDERER_MEDIA_GPU_RTC_VIDEO_DECODER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <deque>
 #include <list>
 #include <map>
 #include <set>
 #include <utility>
 
@@ skipping 282 matching lines @@
 
   // Must be destroyed, or invalidated, on |vda_loop_proxy_|
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<RTCVideoDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoder);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
+#endif  // CONTENT_RENDERER_MEDIA_GPU_RTC_VIDEO_DECODER_H_