Send size to NativeViewportClient::OnCreated instead of GLES2Client::DidCreateContext

mojo/examples/aura_demo/root_window_host_mojo.h

Index: mojo/examples/aura_demo/root_window_host_mojo.h
diff --git a/mojo/examples/aura_demo/root_window_host_mojo.h b/mojo/examples/aura_demo/root_window_host_mojo.h
index 3e35988935d8120a0c621c8d6bf82bc84d7924b0..3a0682ea8c2f91f0f55bcededfdd71aba8cdfe4a 100644
--- a/mojo/examples/aura_demo/root_window_host_mojo.h
+++ b/mojo/examples/aura_demo/root_window_host_mojo.h
@@ -9,6 +9,7 @@
 #include "mojo/public/bindings/lib/remote_ptr.h"
 #include "mojom/native_viewport.h"
 #include "ui/aura/window_tree_host.h"
+#include "ui/gfx/size.h"
 
 namespace ui {
 class ContextFactory;
@@ -53,15 +54,18 @@ class WindowTreeHostMojo : public aura::WindowTreeHost,
   virtual void PrepareForShutdown() OVERRIDE;
 
   // Overridden from NativeViewportClient:
-  virtual void OnCreated() OVERRIDE;
+  virtual void OnCreated(uint32_t width, uint32_t height) MOJO_OVERRIDE;
   virtual void OnDestroyed() OVERRIDE;
   virtual void OnEvent(const Event& event) OVERRIDE;
 
-  void DidCreateContext(gfx::Size size);
+  void DidCreateContext();
+  void MaybeCreateCompositor();
 
   static ui::ContextFactory* context_factory_;
 
+  gfx::Size viewport_size_;
   scoped_ptr<GLES2ClientImpl> gles2_client_;
+  bool context_created_;
   RemotePtr<NativeViewport> native_viewport_;
   base::Callback<void()> compositor_created_callback_;