Fix code style and gyp files in cast to build cast_unittest

media/cast/video_receiver/video_decoder.h

Index: media/cast/video_receiver/video_decoder.h
diff --git a/media/cast/video_receiver/video_decoder.h b/media/cast/video_receiver/video_decoder.h
index abf1955eb996c8c2e5afe8961a14a18e9728be2f..20368327786992397b4c45fb2d767b03d6c8fdae 100644
--- a/media/cast/video_receiver/video_decoder.h
+++ b/media/cast/video_receiver/video_decoder.h
@@ -21,8 +21,6 @@ class VideoDecoder : public base::RefCountedThreadSafe<VideoDecoder>{
  public:
   VideoDecoder(scoped_refptr<CastThread> cast_thread,
                const VideoReceiverConfig& video_config);
-  ~VideoDecoder();
-
 
   // Decode a video frame. Decoded (raw) frame will be returned in the
   // frame_decoded_callback.
@@ -31,7 +29,12 @@ class VideoDecoder : public base::RefCountedThreadSafe<VideoDecoder>{
                         const VideoFrameDecodedCallback& frame_decoded_callback,
                         base::Closure frame_release_callback);
 
+ protected:
+  virtual ~VideoDecoder();
+
  private:
+  friend class base::RefCountedThreadSafe<VideoDecoder>;
+
   void DecodeFrame(const EncodedVideoFrame* encoded_frame,
                    const base::TimeTicks render_time,
                    const VideoFrameDecodedCallback& frame_decoded_callback);