[Cleanup] Remove StringPrintf from global namespace

chrome/browser/sessions/persistent_tab_restore_service_browsertest.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/sessions/persistent_tab_restore_service.h"
 
 #include "base/compiler_specific.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/sessions/session_service.h"
@@ skipping 574 matching lines @@
 }
 
 TEST_F(PersistentTabRestoreServiceTest, PruneEntries) {
   service_->ClearEntries();
   ASSERT_TRUE(service_->entries().empty());
 
   const size_t max_entries = kMaxEntries;
   for (size_t i = 0; i < max_entries + 5; i++) {
     TabNavigation navigation =
         SessionTypesTestHelper::CreateNavigation(
-            StringPrintf("http://%d", static_cast<int>(i)),
-            StringPrintf("%d", static_cast<int>(i)));
+            base::StringPrintf("http://%d", static_cast<int>(i)),
+            base::StringPrintf("%d", static_cast<int>(i)));
 
     Tab* tab = new Tab();
     tab->navigations.push_back(navigation);
     tab->current_navigation_index = 0;
 
     mutable_entries()->push_back(tab);
   }
 
   // Only keep kMaxEntries around.
   EXPECT_EQ(max_entries + 5, service_->entries().size());
@@ skipping 69 matching lines @@
 TEST_F(PersistentTabRestoreServiceTest, PruneIsCalled) {
   CreateSessionServiceWithOneWindow(false);
 
   SessionServiceFactory::GetForProfile(profile())->
       MoveCurrentSessionToLastSession();
 
   profile()->set_restored_last_session(true);
 
   const size_t max_entries = kMaxEntries;
   for (size_t i = 0; i < max_entries + 5; i++) {
-    NavigateAndCommit(GURL(StringPrintf("http://%d", static_cast<int>(i))));
+    NavigateAndCommit(
+        GURL(base::StringPrintf("http://%d", static_cast<int>(i))));
     service_->CreateHistoricalTab(web_contents(), -1);
   }
 
   EXPECT_EQ(max_entries, service_->entries().size());
   // This should not crash.
   service_->LoadTabsFromLastSession();
   EXPECT_EQ(max_entries, service_->entries().size());
 }