[Mac] Hide all shims when Chrome is hidden.

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_MAC_H_
 #define APPS_APP_SHIM_EXTENSION_APP_SHIM_HANDLER_MAC_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 65 matching lines @@
   static void QuitAppForWindow(AppWindow* app_window);
 
   static void HideAppForWindow(AppWindow* app_window);
 
   static void FocusAppForWindow(AppWindow* app_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(AppWindow* app_window);
 
+  // Called by AppControllerMac when Chrome hides.
+  static void OnChromeWillHide();
+
   // AppShimHandler overrides:
   virtual void OnShimLaunch(Host* host,
                             AppShimLaunchType launch_type,
                             const std::vector<base::FilePath>& files) OVERRIDE;
   virtual void OnShimClose(Host* host) OVERRIDE;
   virtual void OnShimFocus(Host* host,
                            AppShimFocusType focus_type,
                            const std::vector<base::FilePath>& files) OVERRIDE;
   virtual void OnShimSetHidden(Host* host, bool hidden) OVERRIDE;
   virtual void OnShimQuit(Host* host) OVERRIDE;
@@ skipping 42 matching lines @@
   content::NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<ExtensionAppShimHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppShimHandler);
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_SHIM_EXTENSION_APP_SHIM_HANDLER_MAC_H_