mojo: first take on removing mojo_main_{chromium,standalone}.

mojo/examples/sample_app/sample_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 "mojo/examples/sample_app/gles2_client_impl.h"
+#include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_runner.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/services/public/interfaces/gpu/gpu.mojom.h"
 #include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
 
 namespace examples {
 
 class SampleApp : public mojo::ApplicationDelegate,
                   public mojo::NativeViewportClient {
@@ skipping 53 matching lines @@
  private:
   scoped_ptr<GLES2ClientImpl> gles2_client_;
   mojo::NativeViewportPtr viewport_;
   mojo::GpuPtr gpu_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleApp);
 };
 
 }  // namespace examples
 
-namespace mojo {
-
-// static
-ApplicationDelegate* ApplicationDelegate::Create() {
-  return new examples::SampleApp();
+MojoResult MojoMain(MojoHandle shell_handle) {
+  mojo::ApplicationRunner runner(new examples::SampleApp);
+  return runner.Run(shell_handle);
 }
-
-}  // namespace mojo