[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/guest_view/extension_options/chrome_extension_options_guest_delegate.h

 // Copyright 2014 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_GUEST_VIEW_EXTENSION_OPTIONS_CHROME_EXTENSION_OPTIONS_GUEST_DELEGATE_H_
 #define CHROME_BROWSER_GUEST_VIEW_EXTENSION_OPTIONS_CHROME_EXTENSION_OPTIONS_GUEST_DELEGATE_H_
 
 #include "extensions/browser/guest_view/extension_options/extension_options_guest_delegate.h"
 
 #include "base/macros.h"
 
 namespace extensions {
 
 class ExtensionOptionsGuest;
 
 class ChromeExtensionOptionsGuestDelegate
     : public ExtensionOptionsGuestDelegate {
  public:
   explicit ChromeExtensionOptionsGuestDelegate(ExtensionOptionsGuest* guest);
   ~ChromeExtensionOptionsGuestDelegate() override;
 
-  void DidInitialize() override;
-
   bool HandleContextMenu(const content::ContextMenuParams& params) override;
 
   content::WebContents* OpenURLInNewTab(
       const content::OpenURLParams& params) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionOptionsGuestDelegate);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_GUEST_VIEW_EXTENSION_OPTIONS_CHROME_EXTENSION_OPTIONS_GUEST_DELEGATE_H_