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

chrome/browser/ui/android/login_prompt_android.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/ui/login/login_prompt.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 37 matching lines @@
     TabAndroid* tab_android = TabAndroid::FromWebContents(web_contents);
 
     // Notify TabAndroid that HTTP authentication is required for current page.
     if (tab_android) {
       chrome_http_auth_handler_.reset(new ChromeHttpAuthHandler(explanation));
       chrome_http_auth_handler_->Init();
       chrome_http_auth_handler_->SetObserver(this);
 
       tab_android->OnReceivedHttpAuthRequest(
           chrome_http_auth_handler_.get()->GetJavaObject(),
-          ASCIIToUTF16(auth_info()->challenger.ToString()),
-          UTF8ToUTF16(auth_info()->realm));
+          base::ASCIIToUTF16(auth_info()->challenger.ToString()),
+          base::UTF8ToUTF16(auth_info()->realm));
 
       // Register to receive a callback to OnAutofillDataAvailable().
       SetModel(manager);
       NotifyAuthNeeded();
     } else {
       CancelAuth();
       LOG(WARNING) << "HTTP Authentication failed because TabAndroid is "
           "missing";
     }
   }
 
  protected:
   virtual ~LoginHandlerAndroid() {}
 
   virtual void CloseDialog() OVERRIDE {}
 
  private:
   scoped_ptr<ChromeHttpAuthHandler> chrome_http_auth_handler_;
 };
 
 // static
 LoginHandler* LoginHandler::Create(net::AuthChallengeInfo* auth_info,
                                    net::URLRequest* request) {
   return new LoginHandlerAndroid(auth_info, request);
 }