Remove ui::KeycodeConverter::CodeToNativeKeycode().

content/renderer/pepper/usb_key_code_conversion.h

-// 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.
-
-#ifndef CONTENT_RENDERER_PEPPER_USB_KEY_CODE_CONVERSION_H_
-#define CONTENT_RENDERER_PEPPER_USB_KEY_CODE_CONVERSION_H_
-
-#include "ppapi/c/pp_stdint.h"
-
-namespace blink {
-class WebKeyboardEvent;
-}  // namespace blink
-
-namespace content {
-
-// Returns a 32-bit "USB Key Code" for the key identifier by the supplied
-// WebKeyboardEvent. The supplied event must be a KeyDown or KeyUp.
-// The code consists of the USB Page (in the high-order 16-bit word) and
-// USB Usage Id of the key.  If no translation can be performed then zero
-// is returned.
-uint32_t UsbKeyCodeForKeyboardEvent(const blink::WebKeyboardEvent& key_event);
-
-// Returns a string that represents the UI Event |code| parameter as specified
-// in http://www.w3.org/TR/uievents/
-const char* CodeForKeyboardEvent(const blink::WebKeyboardEvent& key_event);
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_PEPPER_USB_KEY_CODE_CONVERSION_H_