Disable delegation to picker controller once it is deleted.

chrome/browser/ui/cocoa/web_intent_picker_cocoa.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 CHROME_BROWSER_UI_COCOA_WEB_INTENT_PICKER_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_WEB_INTENT_PICKER_COCOA_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 34 matching lines @@
   void OnSuggestionsLinkClicked(WindowOpenDisposition disposition);
   void OnChooseAnotherService();
 
   // WebIntentPicker implementation.
   virtual void Close() OVERRIDE;
   virtual void SetActionString(const string16& action) OVERRIDE;
   virtual void OnExtensionInstallSuccess(const std::string& id) OVERRIDE;
   virtual void OnExtensionInstallFailure(const std::string& id) OVERRIDE;
   virtual void OnInlineDispositionAutoResize(const gfx::Size& size) OVERRIDE;
   virtual void OnPendingAsyncCompleted() OVERRIDE;
+  virtual void InvalidateDelegate() OVERRIDE;
 
   // WebIntentPickerModelObserver implementation.
   virtual void OnModelChanged(WebIntentPickerModel* model) OVERRIDE;
   virtual void OnFaviconChanged(WebIntentPickerModel* model,
                                 size_t index) OVERRIDE;
   virtual void OnExtensionIconChanged(WebIntentPickerModel* model,
                                       const std::string& extension_id) OVERRIDE;
   virtual void OnInlineDisposition(const string16& title,
                                    const GURL& url) OVERRIDE;
 
@@ skipping 26 matching lines @@
   // Default constructor, for testing only.
   WebIntentPickerCocoa();
 
   // For testing access.
   friend class WebIntentSheetControllerBrowserTest;
 
   DISALLOW_COPY_AND_ASSIGN(WebIntentPickerCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_WEB_INTENT_PICKER_COCOA_H_