Prevent derived classes of GuestViewBase from overriding key methods

chrome/browser/guest_view/web_view/web_view_guest.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_WEB_VIEW_WEB_VIEW_GUEST_H_
 #define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_
 
 #include <vector>
 
 #include "base/observer_list.h"
@@ skipping 53 matching lines @@
   void SetName(const std::string& name);
 
   // Set the zoom factor.
   void SetZoom(double zoom_factor);
 
   // GuestViewBase implementation.
   virtual void Attach(content::WebContents* embedder_web_contents,
                       const base::DictionaryValue& args) OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
   virtual void EmbedderDestroyed() OVERRIDE;
+  virtual void GuestDestroyed() OVERRIDE;
   virtual bool IsDragAndDropEnabled() const OVERRIDE;
+  virtual void WillDestroy() OVERRIDE;
 
   // WebContentsDelegate implementation.
   virtual bool AddMessageToConsole(content::WebContents* source,
                                    int32 level,
                                    const base::string16& message,
                                    int32 line_no,
                                    const base::string16& source_id) OVERRIDE;
   virtual void LoadProgressChanged(content::WebContents* source,
                                    double progress) OVERRIDE;
   virtual void CloseContents(content::WebContents* source) OVERRIDE;
@@ skipping 44 matching lines @@
 
   // BrowserPluginGuestDelegate implementation.
   virtual void DidAttach() OVERRIDE;
   virtual void SizeChanged(const gfx::Size& old_size, const gfx::Size& new_size)
       OVERRIDE;
   virtual void RequestPointerLockPermission(
       bool user_gesture,
       bool last_unlocked_by_target,
       const base::Callback<void(bool)>& callback) OVERRIDE;
   virtual void NavigateGuest(const std::string& src) OVERRIDE;
-  virtual void Destroy() OVERRIDE;
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Returns the current zoom factor.
   double GetZoom();
 
   // Begin or continue a find request.
@@ skipping 142 matching lines @@
       bool is_error_page,
       bool is_iframe_srcdoc,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DocumentLoadedInFrame(
       int64 frame_id,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual bool OnMessageReceived(
       const IPC::Message& message,
       content::RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
-  virtual void WebContentsDestroyed() OVERRIDE;
   virtual void UserAgentOverrideSet(const std::string& user_agent) OVERRIDE;
   virtual void RenderViewReady() OVERRIDE;
 
   // Informs the embedder of a frame name change.
   void ReportFrameNameChange(const std::string& name);
 
   // Called after the load handler is called in the guest's main frame.
   void LoadHandlerCalled();
 
   // Called when a redirect notification occurs.
@@ skipping 116 matching lines @@
         name(name) {}
   };
 
   typedef std::map<WebViewGuest*, NewWindowInfo> PendingWindowMap;
   PendingWindowMap pending_new_windows_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 #endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_