Move mojo\shell to services\shell

mojo/shell/public/cpp/message_loop_ref.h

-// Copyright 2016 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_PUBLIC_CPP_MESSAGE_LOOP_REF_H_
-#define MOJO_SHELL_PUBLIC_CPP_MESSAGE_LOOP_REF_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
-#include "mojo/public/cpp/system/core.h"
-
-namespace mojo {
-
-class MessageLoopRefImpl;
-
-// An interface implementation can keep this object as a member variable to
-// hold a reference to the ShellConnection, keeping it alive as long as the
-// bound implementation exists.
-// Since interface implementations can be bound on different threads than the
-// ShellConnection, this class is safe to use on any thread. However, each
-// instance should only be used on one thread at a time (otherwise there'll be
-// races between the AddRef resulting from cloning and destruction).
-class MessageLoopRef {
- public:
-  virtual ~MessageLoopRef() {}
-
-  virtual scoped_ptr<MessageLoopRef> Clone() = 0;
-};
-
-class MessageLoopRefFactory {
- public:
-  MessageLoopRefFactory();
-  ~MessageLoopRefFactory();
-
-  void set_quit_closure(const base::Closure& quit_closure) {
-    quit_closure_ = quit_closure;
-  }
-
-  scoped_ptr<MessageLoopRef> CreateRef();
-
- private:
-  friend MessageLoopRefImpl;
-
-  // Called from MessageLoopRefImpl.
-  void AddRef();
-  void Release();
-
-  base::Closure quit_closure_;
-  int ref_count_ = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(MessageLoopRefFactory);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_SHELL_PUBLIC_CPP_MESSAGE_LOOP_REF_H_