[Cleanup] Remove StringPrintf from global namespace

chrome/test/webdriver/webdriver_key_converter.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/test/webdriver/webdriver_key_converter.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 233 matching lines @@
     std::string unmodified_text, modified_text;
     int all_modifiers = sticky_modifiers;
 
     // Get the key code, text, and modifiers for the given key.
     bool should_skip = false;
     if (KeyCodeFromSpecialWebDriverKey(key, &key_code) ||
         KeyCodeFromShorthandKey(key, &key_code, &should_skip)) {
       if (should_skip)
         continue;
       if (key_code == ui::VKEY_UNKNOWN) {
-        *error_msg = StringPrintf(
+        *error_msg = base::StringPrintf(
             "Unknown WebDriver key(%d) at string index (%" PRIuS ")",
             static_cast<int>(key),
             i);
         return false;
       }
       if (key_code == ui::VKEY_RETURN) {
         // For some reason Chrome expects a carriage return for the return key.
         modified_text = unmodified_text = "\r";
       } else {
         // WebDriver assumes a numpad key should translate to the number,
@@ skipping 53 matching lines @@
             CreateKeyUpEvent(kModifiers[i].key_code, sticky_modifiers));
       }
     }
   }
   client_key_events->swap(key_events);
   *modifiers = sticky_modifiers;
   return true;
 }
 
 }  // namespace webdriver