Prefix string16 with base:: in ui/.

ui/views/controls/menu/menu_controller.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/views/controls/menu/menu_controller.h"
 
 #if defined(OS_WIN)
 #include <windowsx.h>
 #endif
 
@@ skipping 79 matching lines @@
 bool MatchesMnemonic(MenuItemView* menu, char16 key) {
   return menu->GetMnemonic() == key;
 }
 
 // Returns true if |menu| doesn't have a mnemonic and first character of the its
 // title is |key|.
 bool TitleMatchesMnemonic(MenuItemView* menu, char16 key) {
   if (menu->GetMnemonic())
     return false;
 
-  string16 lower_title = base::i18n::ToLower(menu->title());
+  base::string16 lower_title = base::i18n::ToLower(menu->title());
   return !lower_title.empty() && lower_title[0] == key;
 }
 
 }  // namespace
 
 // Returns the first descendant of |view| that is hot tracked.
 static CustomButton* GetFirstHotTrackedView(View* view) {
   if (!view)
     return NULL;
   CustomButton* button = CustomButton::AsCustomButton(view);
@@ skipping 2226 matching lines @@
              (!pending_state_.item->HasSubmenu() ||
               !pending_state_.item->GetSubmenu()->IsShowing())) {
     // On exit if the user hasn't selected an item with a submenu, move the
     // selection back to the parent menu item.
     SetSelection(pending_state_.item->GetParentMenuItem(),
                  SELECTION_OPEN_SUBMENU);
   }
 }
 
 }  // namespace views