[Cleanup] Remove StringPrintf from global namespace

chrome/browser/extensions/api/declarative/rules_registry_with_cache.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/api/declarative/rules_registry_with_cache.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 
 namespace {
@@ skipping 23 matching lines @@
     const std::string& extension_id,
     const std::vector<linked_ptr<Rule> >& rules) {
   DCHECK(content::BrowserThread::CurrentlyOn(GetOwnerThread()));
 
   // Verify that all rule IDs are new.
   for (std::vector<linked_ptr<Rule> >::const_iterator i =
       rules.begin(); i != rules.end(); ++i) {
     const RuleId& rule_id = *((*i)->id);
     RulesDictionaryKey key(extension_id, rule_id);
     if (rules_.find(key) != rules_.end())
-      return StringPrintf(kDuplicateRuleId, rule_id.c_str());
+      return base::StringPrintf(kDuplicateRuleId, rule_id.c_str());
   }
 
   std::string error = AddRulesImpl(extension_id, rules);
 
   if (!error.empty())
     return error;
 
   // Commit all rules into |rules_| on success.
   for (std::vector<linked_ptr<Rule> >::const_iterator i =
       rules.begin(); i != rules.end(); ++i) {
@@ skipping 91 matching lines @@
     const std::string& extension_id) {
   DCHECK(content::BrowserThread::CurrentlyOn(GetOwnerThread()));
 
   if (delegate_.get())
     delegate_->OnRulesChanged(this, extension_id);
 }
 
 RulesRegistryWithCache::~RulesRegistryWithCache() {}
 
 }  // namespace extensions