[WebsiteSettings] Set view to null on manager to ensure no stale access.

chrome/browser/ui/website_settings/permission_bubble_manager.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_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_
 #define CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_
 
 #include <vector>
 
 #include "base/timer/timer.h"
@@ skipping 26 matching lines @@
 
   // Add a new request to the permission bubble. Ownership of the request
   // remains with the caller. The caller must arrange for the request to
   // outlive the PermissionBubbleManager. If a bubble is visible when this
   // call is made, the request will be queued up and shown after the current
   // bubble closes.
   virtual void AddRequest(PermissionBubbleRequest* request);
 
   // Set the active view for the permission bubble. If this is NULL, it
   // means the permission bubble is no longer showing.
-  virtual void SetView(PermissionBubbleView* view);
+  virtual void SetView(PermissionBubbleView* view) OVERRIDE;
 
  protected:
   // Sets the coalesce time interval to |interval_ms|. For testing only.
   void SetCoalesceIntervalForTesting(int interval_ms);
 
  private:
   friend class PermissionBubbleManagerTest;
   friend class content::WebContentsUserData<PermissionBubbleManager>;
 
   explicit PermissionBubbleManager(content::WebContents* web_contents);
@@ skipping 31 matching lines @@
 
   std::vector<PermissionBubbleRequest*> requests_;
   std::vector<PermissionBubbleRequest*> queued_requests_;
   std::vector<bool> accept_states_;
   bool customization_mode_;
 
   scoped_ptr<base::Timer> timer_;
 };
 
 #endif  // CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_