cc: Defer first OutputSurface creation until client is ready

content/test/web_layer_tree_view_impl_for_testing.cc

Index: content/test/web_layer_tree_view_impl_for_testing.cc
diff --git a/content/test/web_layer_tree_view_impl_for_testing.cc b/content/test/web_layer_tree_view_impl_for_testing.cc
index 72d2ec8d13e9fd6a93e0b9596d62267d73580b0d..3aaebd3d6bf2df1b5b4f65c44d7fa63386076848 100644
--- a/content/test/web_layer_tree_view_impl_for_testing.cc
+++ b/content/test/web_layer_tree_view_impl_for_testing.cc
@@ -36,7 +36,7 @@ WebLayerTreeViewImplForTesting::WebLayerTreeViewImplForTesting() {}
 
 WebLayerTreeViewImplForTesting::~WebLayerTreeViewImplForTesting() {}
 
-bool WebLayerTreeViewImplForTesting::Initialize() {
+void WebLayerTreeViewImplForTesting::Initialize() {
   cc::LayerTreeSettings settings;
 
   // For web contents, layer transforms should scale up the contents of layers
@@ -47,13 +47,11 @@ bool WebLayerTreeViewImplForTesting::Initialize() {
   settings.accelerated_animation_enabled = true;
   layer_tree_host_ =
       cc::LayerTreeHost::CreateSingleThreaded(this, this, NULL, settings);
-  if (!layer_tree_host_)
-    return false;
-  return true;
+  DCHECK(layer_tree_host_);
 }
 
 void WebLayerTreeViewImplForTesting::setSurfaceReady() {
-  layer_tree_host_->SetLayerTreeHostClientReady();
+  layer_tree_host_->SetLayerTreeHostClientReady(CreateOutputSurface(false));
 }
 
 void WebLayerTreeViewImplForTesting::setRootLayer(