[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/extensions/api/tabs/ash_panel_contents.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_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/ash/launcher/launcher_favicon_loader.h"
-#include "content/public/browser/web_contents_observer.h"
 #include "extensions/browser/app_window/app_window.h"
-#include "extensions/browser/extension_function_dispatcher.h"
 
 class AshPanelWindowController;
 class GURL;
 
 namespace content {
 class RenderViewHost;
 }
 
 namespace extensions {
 struct DraggableRegion;
 }
 
 // extensions::AppWindowContents class specific to panel windows created by v1
 // extenstions. This class maintains a WebContents instance and observes it for
 // the purpose of passing messages to the extensions system. It also creates
 // an extensions::WindowController instance for interfacing with the v1
 // extensions API.
 class AshPanelContents
     : public extensions::AppWindowContents,
-      public content::WebContentsObserver,
-      public LauncherFaviconLoader::Delegate,
-      public extensions::ExtensionFunctionDispatcher::Delegate {
+      public LauncherFaviconLoader::Delegate {
  public:
   explicit AshPanelContents(extensions::AppWindow* host);
   ~AshPanelContents() override;
 
   // extensions::AppWindowContents
   void Initialize(content::BrowserContext* context, const GURL& url) override;
   void LoadContents(int32 creator_process_id) override;
   void NativeWindowChanged(
       extensions::NativeAppWindow* native_app_window) override;
   void NativeWindowClosed() override;
   void DispatchWindowShownForTests() const override;
   content::WebContents* GetWebContents() const override;
+  extensions::WindowController* GetWindowController() const override;
 
   // LauncherFaviconLoader::Delegate overrides:
   void FaviconUpdated() override;
 
-  // extensions::ExtensionFunctionDispatcher::Delegate
-  extensions::WindowController* GetExtensionWindowController() const override;
-  content::WebContents* GetAssociatedWebContents() const override;
-
   LauncherFaviconLoader* launcher_favicon_loader_for_test() {
     return launcher_favicon_loader_.get();
   }
 
  private:
-  // content::WebContentsObserver
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  void OnRequest(const ExtensionHostMsg_Request_Params& params);
-
   extensions::AppWindow* host_;
   GURL url_;
   scoped_ptr<content::WebContents> web_contents_;
-  scoped_ptr<extensions::ExtensionFunctionDispatcher>
-      extension_function_dispatcher_;
   scoped_ptr<AshPanelWindowController> window_controller_;
   scoped_ptr<LauncherFaviconLoader> launcher_favicon_loader_;
 
   DISALLOW_COPY_AND_ASSIGN(AshPanelContents);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_