Implements MediaStreamVideoSource.

content/renderer/media/media_stream_dependency_factory.cc

Index: content/renderer/media/media_stream_dependency_factory.cc
diff --git a/content/renderer/media/media_stream_dependency_factory.cc b/content/renderer/media/media_stream_dependency_factory.cc
index 4f4d6f11e90e2e68cbeb00fe4ba909db021f5a71..9550ee28c7cee09d86ab64e394dd048bc108ee90 100644
--- a/content/renderer/media/media_stream_dependency_factory.cc
+++ b/content/renderer/media/media_stream_dependency_factory.cc
@@ -611,6 +611,16 @@ bool MediaStreamDependencyFactory::RemoveNativeMediaStreamTrack(
   return false;
 }
 
+scoped_refptr<webrtc::VideoSourceInterface>
+    MediaStreamDependencyFactory::CreateVideoSource(
+        cricket::VideoCapturer* capturer,
+        const webrtc::MediaConstraintsInterface* constraints) {
+  // The video source takes ownership of |capturer|.

[no longer working on chromium, 2014/01/15 15:57:22]

nit, can you move this comment to the interface instead?

[Ronghua Wu (Left Chromium), 2014/01/15 18:38:58]

Done.

+  scoped_refptr<webrtc::VideoSourceInterface> source =

[perkj_chrome, 2014/01/15 16:24:54]

I just realized that you probably have to call EnsurePeerConnectionFactory here
since this might be the first thing done using pc_factory_.
 

[Ronghua Wu (Left Chromium), 2014/01/15 18:38:58]

I think it's the callers's responsibility to do that. Otherwise we will need to
do EnsurePeerConnectionFactory on all the calls.

+      pc_factory_->CreateVideoSource(capturer, constraints).get();
+  return source;
+}
+
 bool MediaStreamDependencyFactory::CreatePeerConnectionFactory() {
   DCHECK(!pc_factory_.get());
   DCHECK(!audio_device_.get());
@@ -731,7 +741,7 @@ MediaStreamDependencyFactory::CreateLocalVideoSource(
 
   // The video source takes ownership of |capturer|.
   scoped_refptr<webrtc::VideoSourceInterface> source =
-      pc_factory_->CreateVideoSource(capturer, constraints).get();
+      CreateVideoSource(capturer, constraints);
   return source;
 }
 
@@ -774,7 +784,7 @@ MediaStreamDependencyFactory::CreateLocalVideoTrack(
 
   // Create video source from the |capturer|.
   scoped_refptr<webrtc::VideoSourceInterface> source =
-      pc_factory_->CreateVideoSource(capturer, NULL).get();
+      CreateVideoSource(capturer, NULL);
 
   // Create native track from the source.
   return pc_factory_->CreateVideoTrack(id, source.get()).get();