Make cc output surface creation async

android_webview/browser/hardware_renderer.cc

Index: android_webview/browser/hardware_renderer.cc
diff --git a/android_webview/browser/hardware_renderer.cc b/android_webview/browser/hardware_renderer.cc
index a905cef41bac7298ac33f731d1fd414fff9f6643..60f48af1dac3f3a2b5e91238ab07146d22005e0e 100644
--- a/android_webview/browser/hardware_renderer.cc
+++ b/android_webview/browser/hardware_renderer.cc
@@ -245,8 +245,7 @@ void HardwareRenderer::DrawGL(bool stencil_enabled,
   gl_surface_->ResetBackingFrameBufferObject();
 }
 
-scoped_ptr<cc::OutputSurface> HardwareRenderer::CreateOutputSurface(
-    bool fallback) {
+void HardwareRenderer::RequestNewOutputSurface(bool fallback) {
   // Android webview does not support losing output surface.
   DCHECK(!fallback);
   scoped_refptr<cc::ContextProvider> context_provider =
@@ -255,7 +254,8 @@ scoped_ptr<cc::OutputSurface> HardwareRenderer::CreateOutputSurface(
   scoped_ptr<ParentOutputSurface> output_surface_holder(
       new ParentOutputSurface(context_provider));
   output_surface_ = output_surface_holder.get();
-  return output_surface_holder.PassAs<cc::OutputSurface>();
+  layer_tree_host_->SetOutputSurface(
+      output_surface_holder.PassAs<cc::OutputSurface>());
 }
 
 void HardwareRenderer::UnusedResourcesAreAvailable() {