Revert of Move core web_view code to extensions.

extensions/browser/guest_view/web_view/web_view_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 EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
 
 #include "extensions/browser/guest_view/guest_view_base.h"
 
 namespace content {
 class RenderViewHost;
 class WebContents;
 }
 
 namespace extensions {
 
-class WebViewGuest;
-
 namespace api {
 namespace web_view_internal{
 
 struct ContextMenuItem;
 
 }  // namespace web_view_internal
 }  // namespace api
 
 // A delegate class of WebViewGuest that are not a part of chrome.
 class WebViewGuestDelegate {
  public :
-  explicit WebViewGuestDelegate(WebViewGuest* web_view_guest);
+  WebViewGuestDelegate();
   virtual ~WebViewGuestDelegate();
 
   typedef std::vector<linked_ptr<api::web_view_internal::ContextMenuItem> >
       MenuItemVector;
 
   // Returns the current zoom factor.
   virtual double GetZoom() = 0;
 
   // Called when context menu operation was handled.
   virtual bool HandleContextMenu(const content::ContextMenuParams& params) = 0;
 
   // Called to attach helpers just after additional initialization is performed.
   virtual void OnAttachWebViewHelpers(content::WebContents* contents) = 0;
 
-  // Called to perform some cleanup prior to destruction.
-  virtual void OnEmbedderDestroyed() = 0;
-
   // Called when the guest WebContents commits a provisional load in any frame.
   virtual void OnDidCommitProvisionalLoadForFrame(bool is_main_frame) = 0;
 
   // Called just after additional initialization is performed.
   virtual void OnDidInitialize() = 0;
 
   virtual void OnDocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) = 0;
 
   // Called immediately after the guest WebContents has been destroyed.
   virtual void OnGuestDestroyed() = 0;
 
   // Called when to set the zoom factor.
   virtual void OnSetZoom(double zoom_factor) = 0;
 
   // Shows the context menu for the guest.
   // |items| acts as a filter. This restricts the current context's default
   // menu items to contain only the items from |items|.
   // |items| == NULL means no filtering will be applied.
   virtual void OnShowContextMenu(
       int request_id,
       const MenuItemVector* items) = 0;
 
-  WebViewGuest* web_view_guest() const { return web_view_guest_; }
-
  private:
-  WebViewGuest* const web_view_guest_;
-
   DISALLOW_COPY_AND_ASSIGN(WebViewGuestDelegate);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_