Reduce CPU usage for input method switching.

chrome/browser/chromeos/login/keyboard_switch_menu.cc

 // Copyright (c) 2010 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/browser/chromeos/login/keyboard_switch_menu.h"
 
 #include "app/l10n_util.h"
 #include "base/i18n/rtl.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/keyboard_library.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "grit/generated_resources.h"
 #include "views/widget/widget_gtk.h"
 
 namespace chromeos {
 
 KeyboardSwitchMenu::KeyboardSwitchMenu()
     : InputMethodMenu(NULL /* pref_service */,
                       false /* is_browser_mode */,
                       false /* is_screen_locker_mode */,
                       true /* is_out_of_box_experience_mode */) {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // InputMethodMenu::InputMethodMenuHost implementation.
-void KeyboardSwitchMenu::UpdateUI(
-    const std::wstring& name, const std::wstring& tooltip) {
+void KeyboardSwitchMenu::UpdateUI(const std::string& input_method_id,
+                                  const std::wstring& name,
+                                  const std::wstring& tooltip,
+                                  size_t num_active_input_methods) {
   // Update all view hierarchies so that the new input method name is shown in
   // the menu button.
   views::Widget::NotifyLocaleChanged();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // views::ViewMenuDelegate implementation.
 void KeyboardSwitchMenu::RunMenu(views::View* source, const gfx::Point& pt) {
   PrepareForMenuOpen();
   gfx::Point new_pt(pt);
@@ skipping 18 matching lines @@
              "that matches the hardware keyboard layout";
   KeyboardLibrary *library = CrosLibrary::Get()->GetKeyboardLibrary();
   const std::string keyboard_layout_id =
       library->GetHardwareKeyboardLayoutName();
   const std::string language_code =
       input_method::GetLanguageCodeFromInputMethodId(keyboard_layout_id);
   return input_method::GetLanguageDisplayNameFromCode(language_code);
 }
 
 }  // namespace chromeos