Require Renderer::Initialize() to return a status code via callback.

media/base/pipeline.cc

Index: media/base/pipeline.cc
diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index e8fa6c770edd52460335a721b86d8991c90bdb26..88abe19ad8207acbc55cafbe1addbb0fd868c489 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -335,7 +335,7 @@ void Pipeline::StateTransitionTask(PipelineStatus status) {
       return InitializeDemuxer(done_cb);
 
     case kInitRenderer:
-      return InitializeRenderer(base::Bind(done_cb, PIPELINE_OK));
+      return InitializeRenderer(done_cb);
 
     case kPlaying:
       // Report metadata the first time we enter the playing state.
@@ -702,7 +702,7 @@ void Pipeline::InitializeDemuxer(const PipelineStatusCB& done_cb) {
   demuxer_->Initialize(this, done_cb, text_renderer_);
 }
 
-void Pipeline::InitializeRenderer(const base::Closure& done_cb) {
+void Pipeline::InitializeRenderer(const PipelineStatusCB& done_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (!demuxer_->GetStream(DemuxerStream::AUDIO) &&