Mac: Give app_shim code a nicer home

apps/app_shim/app_shim_host_manager_mac.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 APPS_APP_SHIM_APP_SHIM_HOST_MANAGER_MAC_H_
-#define APPS_APP_SHIM_APP_SHIM_HOST_MANAGER_MAC_H_
-
-#include "apps/app_shim/extension_app_shim_handler_mac.h"
-#include "apps/app_shim/unix_domain_socket_acceptor.h"
-#include "base/memory/ref_counted.h"
-#include "content/public/browser/browser_thread.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace test {
-class AppShimHostManagerTestApi;
-}
-
-// The AppShimHostManager receives connections from app shims on a UNIX
-// socket (|acceptor_|) and creates a helper object to manage the connection.
-class AppShimHostManager : public apps::UnixDomainSocketAcceptor::Delegate,
-                           public base::RefCountedThreadSafe<
-                               AppShimHostManager,
-                               content::BrowserThread::DeleteOnUIThread> {
- public:
-  AppShimHostManager();
-
-  // Init passes this AppShimHostManager to PostTask which requires it to have
-  // a non-zero refcount. Therefore, Init cannot be called in the constructor
-  // since the refcount is zero at that point.
-  void Init();
-
-  apps::ExtensionAppShimHandler* extension_app_shim_handler() {
-    return &extension_app_shim_handler_;
-  }
-
- private:
-  friend class base::RefCountedThreadSafe<AppShimHostManager>;
-  friend struct content::BrowserThread::DeleteOnThread<
-      content::BrowserThread::UI>;
-  friend class base::DeleteHelper<AppShimHostManager>;
-  friend class test::AppShimHostManagerTestApi;
-  virtual ~AppShimHostManager();
-
-  // UnixDomainSocketAcceptor::Delegate implementation.
-  virtual void OnClientConnected(const IPC::ChannelHandle& handle) OVERRIDE;
-  virtual void OnListenError() OVERRIDE;
-
-  // The |acceptor_| must be created on a thread which allows blocking I/O, so
-  // part of the initialization of this class must be carried out on the file
-  // thread.
-  void InitOnFileThread();
-
-  // Called on the IO thread to begin listening for connections from app shims.
-  void ListenOnIOThread();
-
-  // The AppShimHostManager is only initialized if the Chrome process
-  // successfully took the singleton lock. This prevents subsequent processes
-  // from deleting existing app shim socket files.
-  bool did_init_;
-
-  base::FilePath directory_in_tmp_;
-
-  scoped_ptr<apps::UnixDomainSocketAcceptor> acceptor_;
-
-  apps::ExtensionAppShimHandler extension_app_shim_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppShimHostManager);
-};
-
-#endif  // APPS_APP_SHIM_APP_SHIM_HOST_MANAGER_MAC_H_