Allow transitioning to HAVE_METADATA before pipeline initialization completes.

webkit/media/webmediaplayer_proxy.cc

Index: webkit/media/webmediaplayer_proxy.cc
diff --git a/webkit/media/webmediaplayer_proxy.cc b/webkit/media/webmediaplayer_proxy.cc
index 100d591037bb9c88ed471a5bab78fc91eb9c45bc..add3fded80e890025777f46462f223146e76e118 100644
--- a/webkit/media/webmediaplayer_proxy.cc
+++ b/webkit/media/webmediaplayer_proxy.cc
@@ -111,6 +111,12 @@ void WebMediaPlayerProxy::PipelineErrorCallback(PipelineStatus error) {
       &WebMediaPlayerProxy::PipelineErrorTask, this, error));
 }
 
+void WebMediaPlayerProxy::PipelineReadyStateCallback(
+    media::Pipeline::ReadyState readyState) {
+  render_loop_->PostTask(FROM_HERE, base::Bind(
+      &WebMediaPlayerProxy::PipelineReadyStateTask, this, readyState));
+}
+
 void WebMediaPlayerProxy::RepaintTask() {
   DCHECK(render_loop_->BelongsToCurrentThread());
   {
@@ -147,6 +153,13 @@ void WebMediaPlayerProxy::PipelineErrorTask(PipelineStatus error) {
     webmediaplayer_->OnPipelineError(error);
 }
 
+void WebMediaPlayerProxy::PipelineReadyStateTask(
+    media::Pipeline::ReadyState readyState) {
+  DCHECK(render_loop_->BelongsToCurrentThread());
+  if (webmediaplayer_)
+    webmediaplayer_->OnPipelineReadyState(readyState);
+}
+
 void WebMediaPlayerProxy::SetOpaqueTask(bool opaque) {
   DCHECK(render_loop_->BelongsToCurrentThread());
   if (webmediaplayer_)