Add utf_string_conversions to base namespace.

chrome/test/webdriver/keycode_text_conversion_win.cc

 // Copyright (c) 2011 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/keycode_text_conversion.h"
 
 #include <windows.h>
 
 #include <cctype>
 
@@ skipping 13 matching lines @@
   if (modifiers & automation::kAltKeyMask)
     keyboard_state[VK_MENU] |= 0x80;
   wchar_t chars[5];
   int code = ::ToUnicode(key_code, scan_code, keyboard_state, chars, 4, 0);
   // |ToUnicode| converts some non-text key codes like F1 to various ASCII
   // control chars. Filter those out.
   if (code <= 0 || (code == 1 && std::iscntrl(chars[0]))) {
     return "";
   } else {
     std::string text;
-    WideToUTF8(chars, code, &text);
+    base::WideToUTF8(chars, code, &text);
     return text;
   }
 }
 
 bool ConvertCharToKeyCode(
     char16 key, ui::KeyboardCode* key_code, int *necessary_modifiers) {
   short vkey_and_modifiers = ::VkKeyScanW(key);
   bool translated = vkey_and_modifiers != -1 &&
                     LOBYTE(vkey_and_modifiers) != -1 &&
                     HIBYTE(vkey_and_modifiers) != -1;
   if (translated) {
     *key_code = static_cast<ui::KeyboardCode>(LOBYTE(vkey_and_modifiers));
     *necessary_modifiers = HIBYTE(vkey_and_modifiers);
   }
   return translated;
 }
 
 }  // namespace webdriver