Teach the native viewport service to draw a Surface into itself

mojo/examples/compositor_app/compositor_app.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdio.h>
 #include <string>
 
 #include "base/macros.h"
 #include "mojo/examples/compositor_app/compositor_host.h"
 #include "mojo/public/c/system/main.h"
@@ skipping 19 matching lines @@
     viewport_.set_client(this);
     viewport_->Create(Rect::From(gfx::Rect(10, 10, 800, 600)));
     viewport_->Show();
 
     // TODO(jamesr): Should be mojo:mojo_gpu_service
     app->ConnectToService("mojo:mojo_native_viewport_service", &gpu_service_);
   }
 
   virtual void OnCreated(uint64_t native_viewport_id) OVERRIDE {
     CommandBufferPtr cb;
+    // TODO(jamesr): Output to a surface instead.
     gpu_service_->CreateOnscreenGLES2Context(
         native_viewport_id, Size::From(gfx::Size(800, 600)), Get(&cb));
     host_.reset(new CompositorHost(cb.PassMessagePipe()));
   }
 
   virtual void OnDestroyed() OVERRIDE { base::MessageLoop::current()->Quit(); }
 
   virtual void OnBoundsChanged(RectPtr bounds) OVERRIDE {
     if (host_)
       host_->SetSize(gfx::Size(bounds->width, bounds->height));
@@ skipping 11 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SampleApp);
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new mojo::examples::SampleApp);
   return runner.Run(shell_handle);
 }