Add a new app API to enable watchdog behavior restarts in kiosk apps

chrome/browser/extensions/api/runtime/chrome_runtime_api_delegate.h

 // Copyright 2014 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 CHROME_BROWSER_EXTENSIONS_API_RUNTIME_CHROME_RUNTIME_API_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_RUNTIME_CHROME_RUNTIME_API_DELEGATE_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 41 matching lines @@
   void RemoveUpdateObserver(extensions::UpdateObserver* observer) override;
   base::Version GetPreviousExtensionVersion(
       const extensions::Extension* extension) override;
   void ReloadExtension(const std::string& extension_id) override;
   bool CheckForUpdates(const std::string& extension_id,
                        const UpdateCheckCallback& callback) override;
   void OpenURL(const GURL& uninstall_url) override;
   bool GetPlatformInfo(extensions::api::runtime::PlatformInfo* info) override;
   bool RestartDevice(std::string* error_message) override;
   bool OpenOptionsPage(const extensions::Extension* extension) override;
+  void SetOnDeviceShutdownCallback(const base::Closure& callback) override;
 
   // content::NotificationObserver implementation.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // ExtensionRegistryObserver implementation.
   void OnExtensionInstalled(content::BrowserContext* browser_context,
                             const extensions::Extension* extension,
                             bool is_update) override;
 
   void UpdateCheckComplete(const std::string& extension_id);
   void CallUpdateCallbacks(const std::string& extension_id,
                            const UpdateCheckResult& result);
 
   content::BrowserContext* browser_context_;
 
   content::NotificationRegistrar registrar_;
 
+  base::Closure on_device_shutdown_callback_;
+
   // Whether the API registered with the ExtensionService to receive
   // update notifications.
   bool registered_for_updates_;
 
   // Map to prevent extensions from getting stuck in reload loops. Maps
   // extension id to the last time it was reloaded and the number of times
   // it was reloaded with not enough time in between reloads.
   std::map<std::string, std::pair<base::TimeTicks, int> > last_reload_time_;
 
   // Information about update checks, keyed by extension id.
   struct UpdateCheckInfo;
   std::map<std::string, UpdateCheckInfo> update_check_info_;
 
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRuntimeAPIDelegate);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_RUNTIME_CHROME_RUNTIME_API_DELEGATE_H_