ui/web_dialogs: Use base::string16 now that string16 was moved into base namespace.

ui/web_dialogs/test/test_web_dialog_delegate.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/web_dialogs/test/test_web_dialog_delegate.h"
 
 #include "base/utf_string_conversions.h"
 
 using content::WebContents;
 using content::WebUIMessageHandler;
 
 namespace ui {
 namespace test {
 
 TestWebDialogDelegate::TestWebDialogDelegate(const GURL& url)
     : url_(url),
       size_(400, 400) {
 }
 
 TestWebDialogDelegate::~TestWebDialogDelegate() {
 }
 
 ModalType TestWebDialogDelegate::GetDialogModalType() const {
   return MODAL_TYPE_WINDOW;
 }
 
-string16 TestWebDialogDelegate::GetDialogTitle() const {
+base::string16 TestWebDialogDelegate::GetDialogTitle() const {
   return UTF8ToUTF16("Test");
 }
 
 GURL TestWebDialogDelegate::GetDialogContentURL() const {
   return url_;
 }
 
 void TestWebDialogDelegate::GetWebUIMessageHandlers(
     std::vector<WebUIMessageHandler*>* handlers) const {
 }
@@ skipping 14 matching lines @@
   if (out_close_dialog)
     *out_close_dialog = true;
 }
 
 bool TestWebDialogDelegate::ShouldShowDialogTitle() const {
   return true;
 }
 
 }  // namespace test
 }  // namespace ui