Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/signin/signin_names_io_thread.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 "chrome/browser/signin/signin_names_io_thread.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 47 matching lines @@
 void SigninNamesOnIOThread::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   CheckOnUIThread();
 
   switch (type) {
     case chrome::NOTIFICATION_GOOGLE_SIGNIN_SUCCESSFUL: {
       const GoogleServiceSigninSuccessDetails* signin_details =
           content::Details<GoogleServiceSigninSuccessDetails>(details).ptr();
-      PostTaskToIOThread(type, UTF8ToUTF16(signin_details->username));
+      PostTaskToIOThread(type, base::UTF8ToUTF16(signin_details->username));
       break;
     }
     case chrome::NOTIFICATION_GOOGLE_SIGNED_OUT: {
       const GoogleServiceSignoutDetails* signout_details =
           content::Details<GoogleServiceSignoutDetails>(details).ptr();
-      PostTaskToIOThread(type, UTF8ToUTF16(signout_details->username));
+      PostTaskToIOThread(type, base::UTF8ToUTF16(signout_details->username));
       break;
     }
     default:
       NOTREACHED() << "Unexpected type=" << type;
   }
 }
 
 void SigninNamesOnIOThread::CheckOnIOThread() const {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
 }
@@ skipping 20 matching lines @@
 void SigninNamesOnIOThread::UpdateOnIOThread(
     int type,
     const base::string16& email) {
   CheckOnIOThread();
   if (type == chrome::NOTIFICATION_GOOGLE_SIGNIN_SUCCESSFUL) {
     emails_.insert(email);
   } else {
     emails_.erase(email);
   }
 }