Fold BeginFrameSource::SetClientReady into AddObserver

content/renderer/android/synchronous_compositor_external_begin_frame_source.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/android/synchronous_compositor_external_begin_frame_source.h"
 
 #include "cc/output/begin_frame_args.h"
 #include "content/renderer/android/synchronous_compositor_registry.h"
 
 namespace content {
@@ skipping 43 matching lines @@
   SetBeginFrameSourcePaused(!client_);
 }
 
 void SynchronousCompositorExternalBeginFrameSource::OnNeedsBeginFramesChanged(
     bool needs_begin_frames) {
   DCHECK(CalledOnValidThread());
   if (client_)
     client_->OnNeedsBeginFramesChange(needs_begin_frames);
 }
 
-void SynchronousCompositorExternalBeginFrameSource::SetClientReady() {
+void SynchronousCompositorExternalBeginFrameSource::AddObserver(
+    cc::BeginFrameObserver* obs) {
   DCHECK(CalledOnValidThread());
+  BeginFrameSourceBase::AddObserver(obs);
+  if (registered_)
+    return;
   registry_->RegisterBeginFrameSource(routing_id_, this);
   registered_ = true;
 }
 
 bool
 SynchronousCompositorExternalBeginFrameSource::CalledOnValidThread() const {
   return thread_checker_.CalledOnValidThread();
 }
 
 }  // namespace content