[System-Keyboard-Lock] Add KeycodeConverter::CodeStringToNativeKeycode() function

ui/events/keycodes/dom/keycode_converter.cc

 // Copyright 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 "ui/events/keycodes/dom/keycode_converter.h"
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversion_utils.h"
 #include "build/build_config.h"
@@ skipping 57 matching lines @@
   if (index >= kDomKeyMapEntries)
     return nullptr;
   return dom_key_map[index].string;
 }
 
 // static
 int KeycodeConverter::InvalidNativeKeycode() {
   return usb_keycode_map[0].native_keycode;
 }
 
+// TODO(zijiehe): Most of the following functions can be optimized by using
+// either multiple arrays or unordered_map.
+
 // static
 DomCode KeycodeConverter::NativeKeycodeToDomCode(int native_keycode) {
   for (size_t i = 0; i < kKeycodeMapEntries; ++i) {
     if (usb_keycode_map[i].native_keycode == native_keycode) {
       if (usb_keycode_map[i].code != NULL)
         return static_cast<DomCode>(usb_keycode_map[i].usb_keycode);
       break;
     }
   }
   return DomCode::NONE;
@@ skipping 202 matching lines @@
 // static
 uint32_t KeycodeConverter::DomCodeToUsbKeycode(DomCode dom_code) {
   for (size_t i = 0; i < kKeycodeMapEntries; ++i) {
     if (usb_keycode_map[i].usb_keycode == static_cast<uint32_t>(dom_code))
       return usb_keycode_map[i].usb_keycode;
   }
   return InvalidUsbKeycode();
 }
 
 // static
-uint32_t KeycodeConverter::CodeToUsbKeycode(const std::string& code) {
+uint32_t KeycodeConverter::CodeStringToUsbKeycode(const std::string& code) {
   if (code.empty())
     return InvalidUsbKeycode();
 
   for (size_t i = 0; i < kKeycodeMapEntries; ++i) {
     if (usb_keycode_map[i].code && code == usb_keycode_map[i].code) {
       return usb_keycode_map[i].usb_keycode;
     }
   }
   return InvalidUsbKeycode();
 }
 
+// static
+int KeycodeConverter::CodeStringToNativeKeycode(const std::string& code) {
+  return UsbKeycodeToNativeKeycode(CodeStringToUsbKeycode(code));
+}
+
 }  // namespace ui