Update AudioRenderer, VideoRenderer, and AudioDecoder Initialize() methods to use PipelineStatusCB.

media/base/composite_filter.cc

Index: media/base/composite_filter.cc
diff --git a/media/base/composite_filter.cc b/media/base/composite_filter.cc
index 2b0166c5b00466d96833feae010bd2a1385b0e7c..4b21ffff7238254a3765f10f5082751c807d9420 100644
--- a/media/base/composite_filter.cc
+++ b/media/base/composite_filter.cc
@@ -443,17 +443,6 @@ void CompositeFilter::OnStatusCB(const base::Closure& callback,
 }
 
 void CompositeFilter::SetError(PipelineStatus error) {
-  // TODO(acolwell): Temporary hack to handle errors that occur
-  // during filter initialization. In this case we just forward
-  // the error to the host even if it is on the wrong thread. We
-  // have to do this because if we defer the call, we can't be
-  // sure the host will get the error before the "init done" callback
-  // is executed. This will be cleaned up when filter init is refactored.
-  if (state_ == kCreated) {
-    SendErrorToHost(error);
-    return;
-  }
-
   if (message_loop_ != MessageLoop::current()) {
     message_loop_->PostTask(FROM_HERE,
         base::Bind(&CompositeFilter::SetError, this, error));
@@ -461,6 +450,7 @@ void CompositeFilter::SetError(PipelineStatus error) {
   }
 
   DCHECK_EQ(message_loop_, MessageLoop::current());
+  DCHECK_NE(state_, kCreated);
 
   // Drop errors recieved while stopping or stopped.
   // This shields the owner of this object from having