[Cleanup] Remove StringPrintf from global namespace

chrome/browser/ui/webui/omnibox/omnibox_ui_handler.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/omnibox/omnibox_ui_handler.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 79 matching lines @@
 }
 
 // For details on the format of the DictionaryValue that this function
 // populates, see the comments by OnResultChanged().
 void OmniboxUIHandler::AddResultToDictionary(const std::string& prefix,
                                              ACMatches::const_iterator it,
                                              ACMatches::const_iterator end,
                                              base::DictionaryValue* output) {
   int i = 0;
   for (; it != end; ++it, ++i) {
-    std::string item_prefix(prefix + StringPrintf(".item_%d", i));
+    std::string item_prefix(prefix + base::StringPrintf(".item_%d", i));
     if (it->provider != NULL) {
       output->SetString(item_prefix + ".provider_name",
                         it->provider->GetName());
       output->SetBoolean(item_prefix + ".provider_done", it->provider->done());
     }
     output->SetInteger(item_prefix + ".relevance", it->relevance);
     output->SetBoolean(item_prefix + ".deletable", it->deletable);
     output->SetString(item_prefix + ".fill_into_edit", it->fill_into_edit);
     output->SetInteger(item_prefix + ".inline_autocomplete_offset",
                        it->inline_autocomplete_offset);
@@ skipping 60 matching lines @@
       true,  // allow exact keyword matches
       AutocompleteInput::ALL_MATCHES));  // want all matches
 }
 
 void OmniboxUIHandler::ResetController() {
   controller_.reset(new AutocompleteController(profile_, this,
       chrome::search::IsInstantExtendedAPIEnabled() ?
           AutocompleteClassifier::kInstantExtendedOmniboxProviders :
           AutocompleteClassifier::kDefaultOmniboxProviders));
 }