[IME] Removes the duplicated IMEs in chrome://settings/languages, and support async component IMEs …

chrome/browser/ui/webui/chromeos/login/network_screen_handler.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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/chromeos/login/screens/network_screen_actor.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
+#include "chromeos/ime/component_extension_ime_manager.h"
 #include "ui/gfx/point.h"
 
 class PrefRegistrySimple;
 
 namespace chromeos {
 
 class CoreOobeActor;
 class IdleDetector;
 
 struct NetworkScreenHandlerOnLanguageChangedCallbackData;
 
 // WebUI implementation of NetworkScreenActor. It is used to interact with
 // the welcome screen (part of the page) of the OOBE.
 class NetworkScreenHandler : public NetworkScreenActor,
-                             public BaseScreenHandler {
+                             public BaseScreenHandler,
+                             public ComponentExtensionIMEManager::Observer {
  public:
   explicit NetworkScreenHandler(CoreOobeActor* core_oobe_actor);
   virtual ~NetworkScreenHandler();
 
   // NetworkScreenActor implementation:
   virtual void SetDelegate(NetworkScreenActor::Delegate* screen) OVERRIDE;
   virtual void PrepareToShow() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void ShowError(const base::string16& message) OVERRIDE;
   virtual void ClearErrors() OVERRIDE;
   virtual void ShowConnectingStatus(bool connecting,
                                     const base::string16& network_id) OVERRIDE;
   virtual void EnableContinue(bool enabled) OVERRIDE;
 
   // BaseScreenHandler implementation:
   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
   virtual void GetAdditionalParameters(base::DictionaryValue* dict) OVERRIDE;
   virtual void Initialize() OVERRIDE;
 
   // WebUIMessageHandler implementation:
   virtual void RegisterMessages() OVERRIDE;
 
+  // ComponentExtensionIMEManager::Observer implementation:
+  virtual void OnInitialized() OVERRIDE;
+
   // Registers the preference for derelict state.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
  private:
   // Handles moving off the screen.
   void HandleOnExit();
 
-  // Handles change of the language.
+  // Handles change of the language, if the given locale is the same as current
+  // locale, it won't refresh the UI.
   void HandleOnLanguageChanged(const std::string& locale);
 
+  // Handles change of the language, the parameter force_refresh can control

[Yuki, 2014/03/07 07:47:04]

nit: s/force_refresh/|force_refresh|/
We use |code_snippet_or_symbol_name| style.

[Shu Chen, 2014/03/07 08:24:09]

Done. I've removed this.

+  // whether to forcibly refresh the UI.
+  void HandleOnLanguageChangedInternal(const std::string& locale,
+                                       bool force_refresh);
+
   // Async callback after ReloadResourceBundle(locale) completed.
   static void OnLanguageChangedCallback(
       scoped_ptr<NetworkScreenHandlerOnLanguageChangedCallbackData> context,
       const std::string& requested_locale,
       const std::string& loaded_locale,
       const bool success);
 
   // Handles change of the input method.
   void HandleOnInputMethodChanged(const std::string& id);
 
@@ skipping 50 matching lines @@
   base::TimeDelta oobe_timer_update_interval_;
 
   base::WeakPtrFactory<NetworkScreenHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_