Fix rare browser crash when closing the Origin Info Bubble.

chrome/browser/ui/cocoa/website_settings/website_settings_bubble_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/website_settings/website_settings_bubble_controller.h"
 
 #include <cmath>
 
 #import <AppKit/AppKit.h>
 
@@ skipping 349 matching lines @@
 
     bridge_.reset(bridge);
     bridge_->set_bubble_controller(self);
   }
   return self;
 }
 
 - (void)windowWillClose:(NSNotification*)notification {
   if (presenter_.get())
     presenter_->OnUIClosing();
+  presenter_.reset();
   [super windowWillClose:notification];
 }
 
 - (void)setPresenter:(WebsiteSettings*)presenter {
   presenter_.reset(presenter);
 }
 
 // Create the subviews for the bubble for internal Chrome pages.
 - (void)initializeContentsForInternalPage {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
@@ skipping 907 matching lines @@
   [bubble_controller_ setPermissionInfo:permission_info_list];
 }
 
 void WebsiteSettingsUIBridge::SetFirstVisit(const base::string16& first_visit) {
   [bubble_controller_ setFirstVisit:first_visit];
 }
 
 void WebsiteSettingsUIBridge::SetSelectedTab(TabId tab_id) {
   [bubble_controller_ setSelectedTab:tab_id];
 }