Adding a skeleton MediaStreamCenter.

content/renderer/media/media_stream_impl.cc

Index: content/renderer/media/media_stream_impl.cc
diff --git a/content/renderer/media/media_stream_impl.cc b/content/renderer/media/media_stream_impl.cc
index 0a3444746972f838cf73392a9e24b96d0b5994a6..545bf2f6bcb80a902f774fd36ee50771df468c23 100644
--- a/content/renderer/media/media_stream_impl.cc
+++ b/content/renderer/media/media_stream_impl.cc
@@ -11,6 +11,7 @@
 #include "base/synchronization/waitable_event.h"
 #include "base/utf_string_conversions.h"
 #include "content/renderer/media/capture_video_decoder.h"
+#include "content/renderer/media/media_stream_center.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/media_stream_dispatcher.h"
 #include "content/renderer/media/peer_connection_handler.h"
@@ -81,6 +82,7 @@ MediaStreamImpl::MediaStreamImpl(
       network_manager_(NULL),
       vc_manager_(vc_manager),
       peer_connection_handler_(NULL),
+      media_stream_center_(NULL),
       message_loop_proxy_(base::MessageLoopProxy::current()),
       signaling_thread_(NULL),
       worker_thread_(NULL),
@@ -125,6 +127,15 @@ WebKit::WebPeerConnectionHandler* MediaStreamImpl::CreatePeerConnectionHandler(
   return peer_connection_handler_;
 }
 
+WebKit::WebMediaStreamCenter* MediaStreamImpl::CreateMediaStreamCenter(
+    WebKit::WebMediaStreamCenterClient* client) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(!media_stream_center_);

[piman, 2012/02/08 01:52:24]

I haven't seen the webkit side, but what ensures this is called only once per
RenderViewImpl?

[tommyw, 2012/02/08 13:14:18]

The corresponding WebKit object MediaStreamCenter is a singleton.

On 2012/02/08 01:52:24, piman wrote:

+
+  media_stream_center_ = new MediaStreamCenter(client);
+  return media_stream_center_;
+}
+
 void MediaStreamImpl::ClosePeerConnection() {
   DCHECK(CalledOnValidThread());
   video_renderer_ = NULL;