Make async waiter explicit MojoGLES2CreateContext param

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/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
-#include "mojo/public/cpp/gles2/gles2.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
 #include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
 #include "ui/gfx/rect.h"
 
 namespace mojo {
 namespace examples {
 
 class SampleApp : public ApplicationDelegate, public NativeViewportClient {
  public:
@@ skipping 23 matching lines @@
   virtual void OnBoundsChanged(RectPtr bounds) OVERRIDE {
     host_->SetSize(gfx::Size(bounds->width, bounds->height));
   }
 
   virtual void OnEvent(EventPtr event,
                        const mojo::Callback<void()>& callback) OVERRIDE {
     callback.Run();
   }
 
  private:
-  mojo::GLES2Initializer gles2;
   NativeViewportPtr viewport_;
   scoped_ptr<CompositorHost> host_;
   DISALLOW_COPY_AND_ASSIGN(SampleApp);
 };
 
 }  // namespace examples
 
 // static
 ApplicationDelegate* ApplicationDelegate::Create() {
   return new examples::SampleApp();
 }
 
 }  // namespace mojo