Add base:: to string16s in win8/.

win8/metro_driver/toast_notification_handler.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_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_
 #define CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_
 
 #include <windows.ui.notifications.h>
 
 #include "base/strings/string16.h"
 #include "base/win/metro.h"
 
 // Provides functionality to display a metro style toast notification.
 class ToastNotificationHandler {
  public:
   // Holds information about a desktop notification to be displayed.
   struct DesktopNotification {
     std::string origin_url;
     std::string icon_url;
-    string16 title;
-    string16 body;
-    string16 display_source;
+    base::string16 title;
+    base::string16 body;
+    base::string16 display_source;
     std::string id;
     base::win::MetroNotificationClickedHandler notification_handler;
-    string16 notification_context;
+    base::string16 notification_context;
 
     DesktopNotification(const char* notification_origin,
                         const char* notification_icon,
                         const wchar_t* notification_title,
                         const wchar_t* notification_body,
                         const wchar_t* notification_display_source,
                         const char* notification_id,
                         base::win::MetroNotificationClickedHandler handler,
                         const wchar_t* handler_context);
 
@@ skipping 10 matching lines @@
                      IInspectable* inspectable);
 
  private:
   mswr::ComPtr<winui::Notifications::IToastNotifier> notifier_;
   mswr::ComPtr<winui::Notifications::IToastNotification> notification_;
   EventRegistrationToken activated_token_;
   DesktopNotification notification_info_;
 };
 
 #endif  // CHROME_BROWSER_UI_METRO_DRIVER_TOAST_NOTIFICATION_HANDLER_H_