Move TranslateLanguageList to the Translate component

chrome/browser/ui/webui/translate_internals/translate_internals_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_
 
 #include <string>
 
+#include "base/callback_list.h"
 #include "chrome/browser/translate/translate_manager.h"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "content/public/common/webplugininfo.h"
 
 struct LanguageDetectionDetails;
 struct TranslateErrorDetails;
 struct TranslateEventDetails;
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 class Value;
 }
 
 // The handler class for TranslateInternals page operations.
 class TranslateInternalsHandler : public content::WebUIMessageHandler,
                                   public TranslateManager::Observer {
  public:
   TranslateInternalsHandler();
   virtual ~TranslateInternalsHandler();
 
   // content::WebUIMessageHandler methods:
   virtual void RegisterMessages() OVERRIDE;
 
   // TranslateManager::Observer methods:
   virtual void OnLanguageDetection(
       const LanguageDetectionDetails& details) OVERRIDE;
   virtual void OnTranslateError(
       const TranslateErrorDetails& details) OVERRIDE;
-  virtual void OnTranslateEvent(
-      const TranslateEventDetails& details) OVERRIDE;
+
+  // Callback for translate events.
+  virtual void OnTranslateEvent(const TranslateEventDetails& details);
 
  private:
   // Handles the Javascript message 'removePrefItem'. This message is sent
   // when UI requests to remove an item in the preference.
   void OnRemovePrefItem(const base::ListValue* args);
 
   // Handles the Javascript message 'requestInfo'. This message is sent
   // when UI needs to show information concerned with the translation.
   // For now, this returns only prefs to Javascript.
   // |args| is not used.
   void OnRequestInfo(const base::ListValue* args);
 
   // Sends a messsage to Javascript.
   void SendMessageToJs(const std::string& message, const base::Value& value);
 
   // Sends the current preference to Javascript.
   void SendPrefsToJs();
 
   // Sends the languages currently supported by the server to JavaScript.
   void SendSupportedLanguagesToJs();
 
+  // Subscription for translate events comming from the translate language list.
+  scoped_ptr<base::CallbackList<
+      void(const TranslateEventDetails&)>::Subscription> event_subscription_;
+
   DISALLOW_COPY_AND_ASSIGN(TranslateInternalsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_TRANSLATE_INTERNALS_TRANSLATE_INTERNALS_HANDLER_H_