[Cleanup] Remove StringPrintf from global namespace

chrome/browser/ui/webui/welcome_ui_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/webui/welcome_ui_android.h"
 
 #include <string>
 
 #include "base/stringprintf.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 16 matching lines @@
   html_source->SetUseJsonJSFormatV2();
 
   // Localized strings.
   html_source->AddLocalizedString("title",
       IDS_NEW_TAB_CHROME_WELCOME_PAGE_TITLE);
   html_source->AddLocalizedString("takeATour", IDS_FIRSTRUN_TAKE_TOUR);
   html_source->AddLocalizedString("firstRunSignedIn", IDS_FIRSTRUN_SIGNED_IN);
   html_source->AddLocalizedString("settings", IDS_FIRSTRUN_SETTINGS_LINK);
 
   std::string locale = g_browser_process->GetApplicationLocale();
-  std::string product_tour_url = StringPrintf(
+  std::string product_tour_url = base::StringPrintf(
       kProductTourBaseURL, locale.c_str());
   html_source->AddString("productTourUrl", product_tour_url);
 
   // Add required resources.
   html_source->SetJsonPath("strings.js");
   html_source->AddResourcePath("about_welcome_android.css",
       IDR_ABOUT_WELCOME_CSS);
   html_source->AddResourcePath("about_welcome_android.js",
       IDR_ABOUT_WELCOME_JS);
   html_source->SetDefaultResource(IDR_ABOUT_WELCOME_HTML);
 
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource::Add(profile, html_source);
 }
 
 WelcomeUI::~WelcomeUI() {
 }