Make RendererGpuVideoDecoderFactories live on arbitrary threads.

content/renderer/media/rtc_video_decoder_factory.h

Index: content/renderer/media/rtc_video_decoder_factory.h
diff --git a/content/renderer/media/rtc_video_decoder_factory.h b/content/renderer/media/rtc_video_decoder_factory.h
index 1974701cf58867fdea5b5cd98af8addbd29c9700..ee4aebf3fad9a9352e8917d7964af80e83f21217 100644
--- a/content/renderer/media/rtc_video_decoder_factory.h
+++ b/content/renderer/media/rtc_video_decoder_factory.h
@@ -8,7 +8,7 @@
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
-#include "media/filters/gpu_video_decoder.h"
+#include "content/renderer/media/renderer_gpu_video_decoder_factories.h"
 #include "third_party/libjingle/source/talk/media/webrtc/webrtcvideodecoderfactory.h"
 #include "third_party/webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
 
@@ -22,7 +22,9 @@ class CONTENT_EXPORT RTCVideoDecoderFactory
     : NON_EXPORTED_BASE(public cricket::WebRtcVideoDecoderFactory) {
  public:
   RTCVideoDecoderFactory(
-      const scoped_refptr<media::GpuVideoDecoder::Factories>& gpu_factories);
+      scoped_ptr<base::Thread> vda_thread,
+      const scoped_refptr<content::RendererGpuVideoDecoderFactories>&
+          gpu_factories);
   virtual ~RTCVideoDecoderFactory();
 
   // Runs on Chrome_libJingle_WorkerThread. The child thread is blocked while
@@ -35,8 +37,8 @@ class CONTENT_EXPORT RTCVideoDecoderFactory
   virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) OVERRIDE;
 
  private:
-  scoped_refptr<base::MessageLoopProxy> vda_loop_proxy_;
-  scoped_ptr<webrtc::VideoDecoder> decoder_;
+  scoped_ptr<base::Thread> vda_thread_;
+  scoped_refptr<content::RendererGpuVideoDecoderFactories> gpu_factories_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoderFactory);
 };