Make RendererGpuVideoDecoderFactories live on arbitrary threads.

content/renderer/media/webmediaplayer_impl.cc

 // 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.
 
 #include "content/renderer/media/webmediaplayer_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 #include <vector>
@@ skipping 1082 matching lines @@
       new media::AudioRendererImpl(media_loop_,
                                    audio_source_provider_.get(),
                                    audio_decoders.Pass(),
                                    set_decryptor_ready_cb,
                                    increase_preroll_on_underflow));
   filter_collection->SetAudioRenderer(audio_renderer.Pass());
 
   // Create our video decoders and renderer.
   ScopedVector<media::VideoDecoder> video_decoders;
 
-  if (gpu_factories_.get()) {
-    video_decoders.push_back(new media::GpuVideoDecoder(
-        media_loop_, gpu_factories_));
-  }
+  if (gpu_factories_.get())
+    video_decoders.push_back(new media::GpuVideoDecoder(gpu_factories_));
 
   // TODO(phajdan.jr): Remove ifdefs when libvpx with vp9 support is released
   // (http://crbug.com/174287) .
 #if !defined(MEDIA_DISABLE_LIBVPX)
   video_decoders.push_back(new media::VpxVideoDecoder(media_loop_));
 #endif  // !defined(MEDIA_DISABLE_LIBVPX)
 
   video_decoders.push_back(new media::FFmpegVideoDecoder(media_loop_));
 
   scoped_ptr<media::VideoRenderer> video_renderer(
@@ skipping 122 matching lines @@
 
   if (pending_repaint_)
     return;
 
   pending_repaint_ = true;
   main_loop_->PostTask(FROM_HERE, base::Bind(
       &WebMediaPlayerImpl::Repaint, AsWeakPtr()));
 }
 
 }  // namespace content