Add a basic NativeViewportX11 for Mojo

mojo/shell/desktop/mojo_main.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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/shell/run.h"
+#include "ui/gl/gl_surface.h"
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   CommandLine::Init(argc, argv);
 
+  gfx::GLSurface::InitializeOneOff();
+
   base::MessageLoop message_loop(base::MessageLoop::TYPE_UI);
   mojo::shell::Context context;
 
   message_loop.PostTask(FROM_HERE, base::Bind(mojo::shell::Run,
                                               &context));
   message_loop.Run();
 
   return 0;
 }