Cleanup mojo_shell and sample_app a bit

mojo/loader/url_request_context_getter.h

-// 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.
-
-#ifndef MOJO_URL_REQUEST_CONTEXT_GETTER_H_
-#define MOJO_URL_REQUEST_CONTEXT_GETTER_H_
-
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop_proxy.h"
-#include "net/url_request/url_request_context_getter.h"
-#include "net/url_request/url_request_context_storage.h"
-
-namespace mojo {
-namespace loader {
-
-class URLRequestContextGetter : public net::URLRequestContextGetter {
- public:
-  URLRequestContextGetter(
-      base::FilePath base_path,
-      base::SingleThreadTaskRunner* network_task_runner,
-      base::MessageLoopProxy* cache_task_runner);
-
-  virtual net::URLRequestContext* GetURLRequestContext() OVERRIDE;
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
-      GetNetworkTaskRunner() const OVERRIDE;
-
- protected:
-  virtual ~URLRequestContextGetter();
-
- private:
-  base::FilePath base_path_;
-  scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
-  scoped_refptr<base::MessageLoopProxy> cache_task_runner_;
-  scoped_ptr<net::NetLog> net_log_;
-  scoped_ptr<net::URLRequestContextStorage> storage_;
-  scoped_ptr<net::URLRequestContext> url_request_context_;
-
-  DISALLOW_COPY_AND_ASSIGN(URLRequestContextGetter);
-};
-
-}  // namespace loader
-}  // namespace mojo
-
-#endif  // MOJO_URL_REQUEST_CONTEXT_GETTER_H_