[Cleanup] Remove StringPrintf from global namespace

ui/message_center/notification_list_unittest.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 "ui/message_center/notification_list.h"
 
 #include "base/basictypes.h"
 #include "base/i18n/time_formatting.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 41 matching lines @@
   }
 
  protected:
   // Currently NotificationListTest doesn't care about some fields like title or
   // message, so put a simple template on it. Returns the id of the new
   // notification.
   std::string AddNotification(const base::DictionaryValue* optional_fields) {
     std::string new_id = base::StringPrintf(kIdFormat, counter_);
     notification_list_->AddNotification(
         message_center::NOTIFICATION_TYPE_SIMPLE, new_id,
-        UTF8ToUTF16(StringPrintf(kTitleFormat, counter_)),
-        UTF8ToUTF16(StringPrintf(kMessageFormat, counter_)),
+        UTF8ToUTF16(base::StringPrintf(kTitleFormat, counter_)),
+        UTF8ToUTF16(base::StringPrintf(kMessageFormat, counter_)),
         UTF8ToUTF16(kDisplaySource), kExtensionId,
         optional_fields);
     counter_++;
     return new_id;
   }
 
   // Utility methods of AddNotification.
   std::string AddPriorityNotification(int priority) {
     base::DictionaryValue optional;
     optional.SetInteger(message_center::kPriorityKey, priority);
@@ skipping 325 matching lines @@
 
   notification_list()->SetQuietMode(false);
   AddNotification(NULL);
   EXPECT_EQ(4u, notification_list()->NotificationCount());
   EXPECT_EQ(1u, GetPopupCounts());
 
   // TODO(mukai): Add test of quiet mode with expiration.
 }
 
 }  // namespace message_center