[Extensions] Move remaining notifications out of ExtensionSettingsHandler

chrome/browser/ui/webui/extensions/extension_settings_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_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/scoped_observer.h"
-#include "chrome/browser/extensions/extension_management.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_ui_message_handler.h"
-#include "extensions/browser/extension_prefs_observer.h"
-#include "extensions/browser/warning_service.h"
 
 class ExtensionService;
 class GURL;
 
-namespace base {
-class FilePath;
-class ListValue;
-}
-
 namespace content {
 class WebUIDataSource;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace extensions {
-class Extension;
-class ExtensionPrefs;
 
 // Extension Settings UI handler.
-class ExtensionSettingsHandler
-    : public content::WebUIMessageHandler,
-      public content::WebContentsObserver,
-      public ExtensionManagement::Observer,
-      public ExtensionPrefsObserver,
-      public WarningService::Observer,
-      public base::SupportsWeakPtr<ExtensionSettingsHandler> {
+class ExtensionSettingsHandler : public content::WebUIMessageHandler,
+                                 public content::WebContentsObserver {
  public:
   ExtensionSettingsHandler();
   ~ExtensionSettingsHandler() override;
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   void GetLocalizedValues(content::WebUIDataSource* source);
 
  private:
-  // content::WebContentsObserver implementation.
-  void RenderViewDeleted(content::RenderViewHost* render_view_host) override;
+  // WebContentsObserver implementation.
   void DidStartNavigationToPendingEntry(
       const GURL& url,
       content::NavigationController::ReloadType reload_type) override;
 
   // WebUIMessageHandler implementation.
   void RegisterMessages() override;
 
-  // ExtensionPrefsObserver implementation.
-  void OnExtensionDisableReasonsChanged(const std::string& extension_id,
-                                        int disable_reasons) override;
-
-  // ExtensionManagement::Observer implementation.
-  void OnExtensionManagementSettingsChanged() override;
-
-  // WarningService::Observer implementation.
-  void ExtensionWarningsChanged() override;
-
   // Helper method that reloads all unpacked extensions.
   void ReloadUnpackedExtensions();
 
-  // Callback for the "extensionSettingsRegister" message.
-  void HandleRegisterMessage(const base::ListValue* args);
-
-  // Forces a UI update if appropriate after a notification is received.
-  void MaybeUpdateAfterNotification();
-
   // Our model.  Outlives us since it's owned by our containing profile.
   ExtensionService* extension_service_;
 
-  ScopedObserver<WarningService, WarningService::Observer>
-      warning_service_observer_;
-
-  // An observer to listen for notable changes in the ExtensionPrefs, like
-  // a change in Disable Reasons.
-  ScopedObserver<ExtensionPrefs, ExtensionPrefsObserver>
-      extension_prefs_observer_;
-
-  ScopedObserver<ExtensionManagement, ExtensionManagement::Observer>
-      extension_management_observer_;
-
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_