[Cleanup] Remove StringPrintf from global namespace

chrome/common/omaha_query_params.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/common/omaha_query_params.h"
 
 #include "base/stringprintf.h"
 #include "chrome/common/chrome_version_info.h"
 
 namespace {
@@ skipping 73 matching lines @@
       break;
   }
   return kUnknown;
 }
 
 }  // namespace
 
 namespace chrome {
 
 std::string OmahaQueryParams::Get(ProdId prod) {
-  return StringPrintf("os=%s&arch=%s&prod=%s&prodchannel=%s&prodversion=%s",
-                      kOs,
-                      kArch,
-                      GetProdIdString(prod),
-                      GetChannelString(),
-                      chrome::VersionInfo().Version().c_str());
+  return base::StringPrintf(
+      "os=%s&arch=%s&prod=%s&prodchannel=%s&prodversion=%s",
+      kOs,
+      kArch,
+      GetProdIdString(prod),
+      GetChannelString(),
+      chrome::VersionInfo().Version().c_str());
 }
 
 }  // namespace chrome