[Cleanup] Remove StringPrintf from global namespace

chrome/browser/extensions/webstore_installer.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/extensions/webstore_installer.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 108 matching lines @@
   // filename and when the download starts writing to it (think concurrently
   // running sharded browser tests installing the same test file, for
   // instance).
   std::string random_number =
       base::Uint64ToString(base::RandGenerator(kuint16max));
 
   base::FilePath file =
       directory.AppendASCII(id + "_" + random_number + ".crx");
 
   int uniquifier = file_util::GetUniquePathNumber(file, FILE_PATH_LITERAL(""));
-  if (uniquifier > 0)
-    file = file.InsertBeforeExtensionASCII(StringPrintf(" (%d)", uniquifier));
+  if (uniquifier > 0) {
+    file = file.InsertBeforeExtensionASCII(
+        base::StringPrintf(" (%d)", uniquifier));
+  }
 
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(callback, file));
 }
 
 }  // namespace
 
 namespace extensions {
 
 void WebstoreInstaller::Delegate::OnExtensionDownloadStarted(
@@ skipping 280 matching lines @@
 void WebstoreInstaller::ReportSuccess() {
   if (delegate_) {
     delegate_->OnExtensionInstallSuccess(id_);
     delegate_ = NULL;
   }
 
   Release();  // Balanced in Start().
 }
 
 }  // namespace extensions