Move mojo\shell to services\shell

mojo/shell/loader.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_SHELL_LOADER_H_
-#define MOJO_SHELL_LOADER_H_
-
-#include "base/callback.h"
-#include "mojo/public/cpp/system/core.h"
-#include "mojo/shell/public/interfaces/connector.mojom.h"
-#include "mojo/shell/public/interfaces/shell_client.mojom.h"
-
-namespace mojo {
-namespace shell {
-
-// Interface to implement special loading behavior for a particular name.
-class Loader {
- public:
-  virtual ~Loader() {}
-
-  virtual void Load(const std::string& name,
-                    mojom::ShellClientRequest request) = 0;
-};
-
-}  // namespace shell
-}  // namespace mojo
-
-#endif  // MOJO_SHELL_LOADER_H_