content: Remove usage of NOTIFICATION_WEB_CONTENTS_DESTROYED from content

content/browser/web_contents/interstitial_page_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process_util.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/renderer_preferences.h"
 #include "googleurl/src/gurl.h"
 
 namespace content {
 class NavigationEntry;
 class RenderViewHostImpl;
 class RenderWidgetHostView;
 class WebContentsView;
 class WebContentsImpl;
 
 enum ResourceRequestAction {
   BLOCK,
   RESUME,
   CANCEL
 };
 
 class CONTENT_EXPORT InterstitialPageImpl
     : public NON_EXPORTED_BASE(InterstitialPage),
       public NotificationObserver,
+      public WebContentsObserver,
       public RenderViewHostDelegate,
       public RenderWidgetHostDelegate {
  public:
   // The different state of actions the user can take in an interstitial.
   enum ActionState {
     NO_ACTION,           // No action has been taken yet.
     PROCEED_ACTION,      // "Proceed" was selected.
     DONT_PROCEED_ACTION  // "Don't proceed" was selected.
   };
 
@@ skipping 36 matching lines @@
   // the RenderViewHost to properly route gestures to the interstitial.
   RenderViewHost* GetRenderViewHost() const;
 #endif
 
  protected:
   // NotificationObserver method:
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
+  // WebContentsObserver implementation:
+  virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE;
+
   // RenderViewHostDelegate implementation:
   virtual RenderViewHostDelegateView* GetDelegateView() OVERRIDE;
   virtual const GURL& GetURL() const OVERRIDE;
   virtual void RenderViewTerminated(RenderViewHost* render_view_host,
                                     base::TerminationStatus status,
                                     int error_code) OVERRIDE;
   virtual void DidNavigate(
       RenderViewHost* render_view_host,
       const ViewHostMsg_FrameNavigate_Params& params) OVERRIDE;
   virtual void UpdateTitle(RenderViewHost* render_view_host,
@@ skipping 53 matching lines @@
   class InterstitialPageRVHDelegateView;
 
   // Disable the interstitial:
   // - if it is not yet showing, then it won't be shown.
   // - any command sent by the RenderViewHost will be ignored.
   void Disable();
 
   // Shutdown the RVH.  We will be deleted by the time this method returns.
   void Shutdown(RenderViewHostImpl* render_view_host);
 
+  void OnNavigatingAwayOrTabClosing();
+
   // Executes the passed action on the ResourceDispatcher (on the IO thread).
   // Used to block/resume/cancel requests for the RenderViewHost hidden by this
   // interstitial.
   void TakeActionOnResourceDispatcher(ResourceRequestAction action);
 
   // The contents in which we are displayed.  This is valid until Hide is
   // called, at which point it will be set to NULL because the WebContents
   // itself may be deleted.
   WebContentsImpl* web_contents_;
 
@@ skipping 58 matching lines @@
   scoped_ptr<InterstitialPageDelegate> delegate_;
 
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_