Convert string16 to base::string16 in content.

content/common/desktop_notification_messages.h

 // Copyright (c) 2011 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.
 
 // IPC messages for desktop notification.
 // Multiply-included message file, hence no include guard.
 
 #include "content/public/common/show_desktop_notification_params.h"
 #include "ipc/ipc_message_macros.h"
 
@@ skipping 13 matching lines @@
 
 // Used to inform the renderer that the browser has displayed its
 // requested notification.
 IPC_MESSAGE_ROUTED1(DesktopNotificationMsg_PostDisplay,
                     int /* notification_id */)
 
 // Used to inform the renderer that the browser has encountered an error
 // trying to display a notification.
 IPC_MESSAGE_ROUTED2(DesktopNotificationMsg_PostError,
                     int /* notification_id */,
-                    string16 /* message */)
+                    base::string16 /* message */)
 
 // Informs the renderer that the one if its notifications has closed.
 IPC_MESSAGE_ROUTED2(DesktopNotificationMsg_PostClose,
                     int /* notification_id */,
                     bool /* by_user */)
 
 // Informs the renderer that one of its notifications was clicked on.
 IPC_MESSAGE_ROUTED1(DesktopNotificationMsg_PostClick,
                     int /* notification_id */)
 
 // Informs the renderer that the one if its notifications has closed.
 IPC_MESSAGE_ROUTED1(DesktopNotificationMsg_PermissionRequestDone,
                     int /* request_id */)
 
 // Messages sent from the renderer to the browser.
 
 IPC_MESSAGE_ROUTED1(DesktopNotificationHostMsg_Show,
                     content::ShowDesktopNotificationHostMsgParams)
 
 IPC_MESSAGE_ROUTED1(DesktopNotificationHostMsg_Cancel,
                     int /* notification_id */)
 
 IPC_MESSAGE_ROUTED2(DesktopNotificationHostMsg_RequestPermission,
                     GURL /* origin */,
                     int /* callback_context */)
 
 IPC_SYNC_MESSAGE_ROUTED1_1(DesktopNotificationHostMsg_CheckPermission,
                            GURL /* origin */,
                            int /* permission_result */)