Make RendererGpuVideoDecoderFactories live on arbitrary threads.

content/renderer/media/mock_media_stream_dependency_factory.cc

 // 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.
 
 #include "content/renderer/media/mock_media_stream_dependency_factory.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/renderer/media/mock_peer_connection_impl.h"
 #include "content/renderer/media/webrtc_audio_capturer.h"
@@ skipping 346 matching lines @@
     return true;
   }
 
  private:
   std::string sdp_mid_;
   int sdp_mline_index_;
   std::string sdp_;
 };
 
 MockMediaStreamDependencyFactory::MockMediaStreamDependencyFactory()
-    : MediaStreamDependencyFactory(NULL, NULL),
+    : MediaStreamDependencyFactory(NULL, NULL, NULL),
       mock_pc_factory_created_(false) {
 }
 
 MockMediaStreamDependencyFactory::~MockMediaStreamDependencyFactory() {}
 
 bool MockMediaStreamDependencyFactory::EnsurePeerConnectionFactory() {
   mock_pc_factory_created_ = true;
   return true;
 }
 
@@ skipping 90 matching lines @@
 
 webrtc::IceCandidateInterface*
 MockMediaStreamDependencyFactory::CreateIceCandidate(
     const std::string& sdp_mid,
     int sdp_mline_index,
     const std::string& sdp) {
   return new MockIceCandidate(sdp_mid, sdp_mline_index, sdp);
 }
 
 }  // namespace content