[Cleanup] Remove StringPrintf from global namespace

chrome/browser/printing/cloud_print/cloud_print_url.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/browser/printing/cloud_print/cloud_print_url.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/stringprintf.h"
@@ skipping 72 matching lines @@
   return cloud_print_manage_url;
 }
 
 GURL CloudPrintURL::GetCloudPrintServiceEnableURL(
     const std::string& proxy_id) {
   GURL cloud_print_service_url = GetCloudPrintServiceURL();
   std::string path(cloud_print_service_url.path() +
       "/enable_chrome_connector/enable.html");
   GURL::Replacements replacements;
   replacements.SetPathStr(path);
-  std::string query = StringPrintf("proxy=%s", proxy_id.c_str());
+  std::string query = base::StringPrintf("proxy=%s", proxy_id.c_str());
   replacements.SetQueryStr(query);
   GURL cloud_print_enable_url = cloud_print_service_url.ReplaceComponents(
       replacements);
   return cloud_print_enable_url;
 }
 
 GURL CloudPrintURL::GetCloudPrintLearnMoreURL() {
   GURL cloud_print_learn_more_url(kLearnMoreURL);
   return cloud_print_learn_more_url;
 }
 
 GURL CloudPrintURL::GetCloudPrintTestPageURL() {
   GURL cloud_print_learn_more_url(kTestPageURL);
   return cloud_print_learn_more_url;
 }