[Extensions] Clean up the handling of ExtensionHostMsg_Request

chrome/browser/guest_view/extension_options/chrome_extension_options_guest_delegate.cc

 // 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.
 
 #include "chrome/browser/guest_view/extension_options/chrome_extension_options_guest_delegate.h"
 
-#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "components/renderer_context_menu/context_menu_delegate.h"
 #include "extensions/browser/guest_view/extension_options/extension_options_guest.h"
 
 namespace extensions {
 
 ChromeExtensionOptionsGuestDelegate::ChromeExtensionOptionsGuestDelegate(
     ExtensionOptionsGuest* guest)
     : ExtensionOptionsGuestDelegate(guest) {
 }
 
 ChromeExtensionOptionsGuestDelegate::~ChromeExtensionOptionsGuestDelegate() {
 }
 
-void ChromeExtensionOptionsGuestDelegate::DidInitialize() {
-  ChromeExtensionWebContentsObserver::CreateForWebContents(
-      extension_options_guest()->web_contents());
-}
-
 bool ChromeExtensionOptionsGuestDelegate::HandleContextMenu(
     const content::ContextMenuParams& params) {
   ContextMenuDelegate* menu_delegate = ContextMenuDelegate::FromWebContents(
       extension_options_guest()->web_contents());
   DCHECK(menu_delegate);
 
   scoped_ptr<RenderViewContextMenuBase> menu = menu_delegate->BuildMenu(
       extension_options_guest()->web_contents(), params);
   menu_delegate->ShowMenu(menu.Pass());
   return true;
 }
 
 content::WebContents* ChromeExtensionOptionsGuestDelegate::OpenURLInNewTab(
     const content::OpenURLParams& params) {
   Browser* browser = chrome::FindBrowserWithWebContents(
       extension_options_guest()->embedder_web_contents());
   return browser->OpenURL(params);
 }
 
 }  // namespace extensions