Prefix string16 with base:: in ui/.

ui/base/win/message_box_win.cc

 // 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.
 
 #include "ui/base/win/message_box_win.h"
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "ui/base/ui_base_switches.h"
 
 namespace ui {
 
 // In addition to passing the RTL flags to ::MessageBox if we are running in an
 // RTL locale, we need to make sure that LTR strings are rendered correctly by
 // adding the appropriate Unicode directionality marks.
 int MessageBox(HWND hwnd,
-               const string16& text,
-               const string16& caption,
+               const base::string16& text,
+               const base::string16& caption,
                UINT flags) {
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoMessageBox))
     return IDOK;
 
   UINT actual_flags = flags;
   if (base::i18n::IsRTL())
     actual_flags |= MB_RIGHT | MB_RTLREADING;
 
-  string16 localized_text = text;
+  base::string16 localized_text = text;
   base::i18n::AdjustStringForLocaleDirection(&localized_text);
   const wchar_t* text_ptr = localized_text.c_str();
 
-  string16 localized_caption = caption;
+  base::string16 localized_caption = caption;
   base::i18n::AdjustStringForLocaleDirection(&localized_caption);
   const wchar_t* caption_ptr = localized_caption.c_str();
 
   return ::MessageBox(hwnd, text_ptr, caption_ptr, actual_flags);
 }
 
 }  // namespace ui