Refactor MediaStreamImpl and PeerConnection glue implementation after WebKit changes.

content/renderer/media/media_stream_center.cc

Index: content/renderer/media/media_stream_center.cc
diff --git a/content/renderer/media/media_stream_center.cc b/content/renderer/media/media_stream_center.cc
index 75b266dc49187d94d2be4d1ca66d02897d941e2b..f3d3429d6fb004b04eb72844ec186862ff0bcc47 100644
--- a/content/renderer/media/media_stream_center.cc
+++ b/content/renderer/media/media_stream_center.cc
@@ -9,17 +9,79 @@
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
+#include "content/renderer/media/media_stream_impl.h"
+#include "content/renderer/media/media_stream_extra_data.h"
+#include "content/renderer/render_view_impl.h"
 #include "third_party/libjingle/source/talk/app/webrtc/jsep.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebICECandidateDescriptor.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamCenterClient.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamComponent.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamDescriptor.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSource.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebMediaStreamSourcesRequest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSessionDescriptionDescriptor.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 
 namespace content {
 
+static MediaStreamImpl* GetMediaStreamImpl(WebKit::WebFrame* web_frame) {
+  RenderViewImpl* render_view = RenderViewImpl::FromWebView(web_frame->view());
+  if (!render_view)
+    return NULL;
+
+  // TODO(perkj): Avoid this cast?
+  return static_cast<MediaStreamImpl*>(render_view->userMediaClient());
+}
+
+static webrtc::MediaStreamInterface* GetNativeMediaStream(
+    const WebKit::WebMediaStreamDescriptor& stream) {
+  MediaStreamExtraData* extra_data =
+      static_cast<MediaStreamExtraData*>(stream.extraData());
+  if (extra_data && extra_data->remote_stream())
+    return extra_data->remote_stream();
+
+  if (extra_data && extra_data->local_stream())
+    return extra_data->local_stream();
+
+  // TODO(perkj): This can occur if a JS create a new MediaStream based on an
+  // existing MediaStream.
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+template <class TrackList>
+static webrtc::MediaStreamTrackInterface* GetTrack(
+    const std::string& source_id,
+    TrackList* tracks) {
+  for (size_t i = 0; i < tracks->count(); ++i) {
+    if (tracks->at(i)->label() == source_id)
+      return tracks->at(i);
+  }
+  return NULL;
+}
+
+static webrtc::MediaStreamTrackInterface* GetNativeMediaStreamTrack(
+      const WebKit::WebMediaStreamDescriptor& stream,
+      const WebKit::WebMediaStreamComponent& component) {
+  std::string source_id = UTF16ToUTF8(component.source().id());
+  webrtc::MediaStreamInterface* native_stream = GetNativeMediaStream(stream);
+  if (native_stream) {
+    if (component.source().type() == WebKit::WebMediaStreamSource::TypeAudio) {
+      return GetTrack<webrtc::AudioTracks>(
+          source_id, native_stream->audio_tracks());
+    }
+    if (component.source().type() == WebKit::WebMediaStreamSource::TypeVideo) {
+      return GetTrack<webrtc::VideoTracks>(
+          source_id, native_stream->video_tracks());
+    }
+  }
+  // TODO(perkj): This can occur if a JS create a new MediaStream based on an
+  // existing MediaStream.
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
 MediaStreamCenter::MediaStreamCenter(
     WebKit::WebMediaStreamCenterClient* client)
     : client_(client) {
@@ -34,19 +96,47 @@ void MediaStreamCenter::queryMediaStreamSources(
 void MediaStreamCenter::didEnableMediaStreamTrack(
     const WebKit::WebMediaStreamDescriptor& stream,
     const WebKit::WebMediaStreamComponent& component) {
+  webrtc::MediaStreamTrackInterface* track =
+      GetNativeMediaStreamTrack(stream, component);
+  if (track)
+    track->set_enabled(true);
 }
 
 void MediaStreamCenter::didDisableMediaStreamTrack(
     const WebKit::WebMediaStreamDescriptor& stream,
     const WebKit::WebMediaStreamComponent& component) {
+  webrtc::MediaStreamTrackInterface* track =
+      GetNativeMediaStreamTrack(stream, component);
+  if (track)
+    track->set_enabled(false);
 }
 
 void MediaStreamCenter::didStopLocalMediaStream(
     const WebKit::WebMediaStreamDescriptor& stream) {
+  DVLOG(1) << "MediaStreamCenter::didStopLocalMediaStream";
+  WebKit::WebFrame* web_frame = WebKit::WebFrame::frameForCurrentContext();
+  if (!web_frame)
+    return;
+  MediaStreamImpl* ms_impl = GetMediaStreamImpl(web_frame);
+  if (ms_impl) {
+    ms_impl->StopLocalMediaStream(stream);
+    return;
+  }
+
+  NOTREACHED();
 }
 
-void MediaStreamCenter::didConstructMediaStream(
-    const WebKit::WebMediaStreamDescriptor& stream) {
+void MediaStreamCenter::didCreateMediaStream(
+    WebKit::WebMediaStreamDescriptor& stream) {
+  WebKit::WebFrame* web_frame = WebKit::WebFrame::frameForCurrentContext();
+  if (!web_frame)
+    return;
+  MediaStreamImpl* ms_impl = GetMediaStreamImpl(web_frame);
+  if (ms_impl) {
+    ms_impl->CreateMediaStream(web_frame, &stream);
+    return;
+  }
+  NOTREACHED();
 }
 
 WebKit::WebString MediaStreamCenter::constructSDP(