Add Hide to app menu.

apps/app_shim/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_APP_SHIM_HANDLER_MAC_H_
 #define APPS_APP_SHIM_APP_SHIM_HANDLER_MAC_H_
 
 #include <string>
 
 #include "apps/app_shim/app_shim_launch.h"
 #include "base/files/file_path.h"
 
 class Profile;
 
 namespace apps {
 
 // Registrar, and interface for services that can handle interactions with OSX
 // shim processes.
 class AppShimHandler {
  public:
   class Host {
    public:
     // Invoked when the app is successfully launched.
     virtual void OnAppLaunchComplete(AppShimLaunchResult result) = 0;
     // Invoked when the app is closed in the browser process.
     virtual void OnAppClosed() = 0;
+    // Invoked when the app should be hidden.
+    virtual void OnAppHide() = 0;
     // Invoked when the app is requesting user attention.
     virtual void OnAppRequestUserAttention() = 0;
 
     // Allows the handler to determine which app this host corresponds to.
     virtual base::FilePath GetProfilePath() const = 0;
     virtual std::string GetAppId() const = 0;
 
    protected:
     virtual ~Host() {}
   };
@@ skipping 32 matching lines @@
   virtual void OnShimQuit(Host* host) = 0;
 
  protected:
   AppShimHandler() {}
   virtual ~AppShimHandler() {}
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_SHIM_APP_SHIM_HANDLER_MAC_H_