Allow partial update for notification update API

chrome/browser/extensions/api/notifications/notifications_api.h

 // Copyright (c) 2012 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_NOTIFICATIONS_NOTIFICATIONS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_NOTIFICATIONS_API_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/api_function.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/extensions/api/notifications.h"
 #include "ui/message_center/notification_types.h"
 
+class Notification;
+
 namespace extensions {
 
 class NotificationsApiFunction : public ApiFunction {
  public:
   // Whether the current extension and channel allow the API. Public for
   // testing.
   bool IsNotificationsApiAvailable();
 
  protected:
   NotificationsApiFunction();
   virtual ~NotificationsApiFunction();
 
   bool CreateNotification(const std::string& id,
                           api::notifications::NotificationOptions* options);
+  bool UpdateNotification(const std::string& id,
+                          api::notifications::NotificationOptions* options,
+                          Notification* notification);
 
   bool IsNotificationsApiEnabled();
 
   // Called inside of RunImpl.
   virtual bool RunNotificationsApi() = 0;
 
   // UITHreadExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
   message_center::NotificationType MapApiTemplateTypeToType(
@@ skipping 58 matching lines @@
  protected:
   virtual ~NotificationsGetAllFunction();
 
  private:
   DECLARE_EXTENSION_FUNCTION("notifications.getAll", NOTIFICATIONS_GET_ALL)
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_NOTIFICATIONS_NOTIFICATIONS_API_H_