Convert LocationBar::GetInputString from wstring to string16.

chrome/test/base/test_location_bar.cc

 // 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.
 
 #include "chrome/test/base/test_location_bar.h"
 
 TestLocationBar::TestLocationBar()
     : disposition_(CURRENT_TAB),
       transition_(PageTransition::LINK) {
 }
 
 TestLocationBar::~TestLocationBar() {}
 
-std::wstring TestLocationBar::GetInputString() const {
+string16 TestLocationBar::GetInputString() const {
   return input_string_;
 }
 
 WindowOpenDisposition TestLocationBar::GetWindowOpenDisposition() const {
   return disposition_;
 }
 
 PageTransition::Type TestLocationBar::GetPageTransition() const {
   return transition_;
 }
 
 const OmniboxView* TestLocationBar::location_entry() const {
   return NULL;
 }
 
 OmniboxView* TestLocationBar::location_entry() {
   return NULL;
 }
 
 LocationBarTesting* TestLocationBar::GetLocationBarForTesting() {
   return NULL;
 }