cc: Defer first OutputSurface creation until client is ready

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 90ae2feaad789f1c7a605a028c8122c7d50c3cb1..258805005e3bd21e54a5e6e94b6924932737f019 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -281,8 +281,7 @@ scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
   }
 #endif
 
-  if (!compositor->Initialize(settings))
-    return scoped_ptr<RenderWidgetCompositor>();
+  compositor->Initialize(settings);
 
   return compositor.Pass();
 }
@@ -390,7 +389,7 @@ bool RenderWidgetCompositor::ScheduleMicroBenchmark(
   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 }
 
-bool RenderWidgetCompositor::Initialize(cc::LayerTreeSettings settings) {
+void RenderWidgetCompositor::Initialize(cc::LayerTreeSettings settings) {
   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy =
       RenderThreadImpl::current()->compositor_message_loop_proxy();
   if (compositor_message_loop_proxy.get()) {
@@ -400,7 +399,7 @@ bool RenderWidgetCompositor::Initialize(cc::LayerTreeSettings settings) {
     layer_tree_host_ = cc::LayerTreeHost::CreateSingleThreaded(
         this, this, NULL, settings);
   }
-  return layer_tree_host_;
+  DCHECK(layer_tree_host_);
 }
 
 void RenderWidgetCompositor::setSurfaceReady() {