Update some uses of char16 to use the base:: namespace.

chrome/test/chromedriver/keycode_text_conversion_win.cc

 // Copyright (c) 2013 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/chromedriver/keycode_text_conversion.h"
 
 #include <stdlib.h>
 #include <windows.h>
 
 #include "base/strings/utf_string_conversions.h"
@@ skipping 17 matching lines @@
   // |ToUnicode| converts some non-text key codes like F1 to various
   // control chars. Filter those out.
   if (code <= 0 || (code == 1 && iswcntrl(chars[0])))
     *text = std::string();
   else
     base::WideToUTF8(chars, code, text);
   return true;
 }
 
 bool ConvertCharToKeyCode(
-    char16 key, ui::KeyboardCode* key_code, int *necessary_modifiers,
+    base::char16 key, ui::KeyboardCode* key_code, int *necessary_modifiers,
     std::string* error_msg) {
   short vkey_and_modifiers = ::VkKeyScanW(key);
   bool translated = vkey_and_modifiers != -1 &&
                     LOBYTE(vkey_and_modifiers) != 0xFF &&
                     HIBYTE(vkey_and_modifiers) != 0xFF;
   *error_msg = std::string();
   if (translated) {
     *key_code = static_cast<ui::KeyboardCode>(LOBYTE(vkey_and_modifiers));
     int win_modifiers = HIBYTE(vkey_and_modifiers);
     int modifiers = 0;
     if (win_modifiers & 0x01)
       modifiers |= kShiftKeyModifierMask;
     if (win_modifiers & 0x02)
       modifiers |= kControlKeyModifierMask;
     if (win_modifiers & 0x04)
       modifiers |= kAltKeyModifierMask;
     // Ignore bit 0x08: It is for Hankaku key.
     *necessary_modifiers = modifiers;
   }
   return translated;
 }