Improve GL helpers.

mojo/gpu/gl_context_owner.h

 // Copyright 2014 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.
 
 #ifndef MOJO_GPU_GL_CONTEXT_OWNER_H_
 #define MOJO_GPU_GL_CONTEXT_OWNER_H_
 
 #include "base/memory/weak_ptr.h"
 
 namespace mojo {
 class GLContext;
+class ApplicationConnector;
 class Shell;
 
 class GLContextOwner {
  public:
-  explicit GLContextOwner(mojo::Shell* shell);
+  explicit GLContextOwner(ApplicationConnector* connector);
+
   ~GLContextOwner();
 
   const base::WeakPtr<mojo::GLContext>& context() const { return context_; }
 
  private:
   base::WeakPtr<mojo::GLContext> context_;
 
   DISALLOW_COPY_AND_ASSIGN(GLContextOwner);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_GPU_GL_CONTEXT_OWNER_H_