Add Hide to app menu.

apps/app_shim/extension_app_shim_handler_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_EXTENSION_APP_SHIM_HANDLER_H_
 #define APPS_APP_SHIM_EXTENSION_APP_SHIM_HANDLER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 51 matching lines @@
     virtual void MaybeTerminate();
   };
 
   ExtensionAppShimHandler();
   virtual ~ExtensionAppShimHandler();
 
   AppShimHandler::Host* FindHost(Profile* profile, const std::string& app_id);
 
   static void QuitAppForWindow(ShellWindow* shell_window);
 
+  static void HideAppForWindow(ShellWindow* shell_window);
+
   // Brings the window to the front without showing it and instructs the shim to
   // request user attention. Returns false if there is no shim for this window.
   static bool RequestUserAttentionForWindow(ShellWindow* shell_window);
 
   // AppShimHandler overrides:
   virtual void OnShimLaunch(Host* host, AppShimLaunchType launch_type) OVERRIDE;
   virtual void OnShimClose(Host* host) OVERRIDE;
   virtual void OnShimFocus(Host* host, AppShimFocusType focus_type) OVERRIDE;
   virtual void OnShimSetHidden(Host* host, bool hidden) OVERRIDE;
   virtual void OnShimQuit(Host* host) OVERRIDE;
@@ skipping 37 matching lines @@
   bool browser_opened_ever_;
 
   base::WeakPtrFactory<ExtensionAppShimHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppShimHandler);
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_SHIM_EXTENSION_APP_SHIM_HANDLER_H_