cc: Update Main RendererCapabilities on DeferredInitialize

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index 5972a9f8303986a65849be5b35357767753d8066..6dc3096b5985c89beda940cda6739805696ac50c 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -67,6 +67,18 @@ RendererCapabilities::RendererCapabilities()
 
 RendererCapabilities::~RendererCapabilities() {}
 
+bool RendererCapabilities::operator==(const RendererCapabilities& other) const {
+  return best_texture_format == other.best_texture_format &&
+         allow_partial_texture_updates == other.allow_partial_texture_updates &&
+         using_offscreen_context3d == other.using_offscreen_context3d &&
+         max_texture_size == other.max_texture_size &&
+         using_shared_memory_resources == other.using_shared_memory_resources;
+}
+
+bool RendererCapabilities::operator!=(const RendererCapabilities& other) const {
+  return !(*this == other);
+}
+
 scoped_ptr<LayerTreeHost> LayerTreeHost::CreateThreaded(
     LayerTreeHostClient* client,
     SharedBitmapManager* manager,
@@ -178,10 +190,18 @@ void LayerTreeHost::SetLayerTreeHostClientReady() {
   proxy_->SetLayerTreeHostClientReady();
 }
 
-static void LayerTreeHostOnOutputSurfaceCreatedCallback(Layer* layer) {
+static void LayerTreeHostRendererCapabilitiesChanged(Layer* layer) {
+  // TODO(boliu): Rename this to Layer::RendererCapabilitiesChanged.
   layer->OnOutputSurfaceCreated();
 }
 
+void LayerTreeHost::RendererCapabilitiesChanged() {
+  if (root_layer()) {
+    LayerTreeHostCommon::CallFunctionForSubtree(
+        root_layer(), base::Bind(&LayerTreeHostRendererCapabilitiesChanged));
+  }
+}
+
 LayerTreeHost::CreateResult
 LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted(bool success) {
   TRACE_EVENT1("cc",
@@ -200,12 +220,6 @@ LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted(bool success) {
           contents_texture_manager_->CreateTexture(gfx::Size(), RGBA_8888);
     }
 
-    if (root_layer()) {
-      LayerTreeHostCommon::CallFunctionForSubtree(
-          root_layer(),
-          base::Bind(&LayerTreeHostOnOutputSurfaceCreatedCallback));
-    }
-
     client_->DidInitializeOutputSurface(true);
     return CreateSucceeded;
   }