Fix crash when programatically closing media gallery dialog

chrome/browser/media_gallery/media_galleries_dialog_controller.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_MEDIA_GALLERY_MEDIA_GALLERIES_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_MEDIA_GALLERY_MEDIA_GALLERIES_DIALOG_CONTROLLER_H_
 
 #include <list>
 #include <map>
 
@@ skipping 58 matching lines @@
 
   // Called by the view.
   virtual string16 GetHeader() const;
   virtual string16 GetSubtext() const;
   virtual bool HasPermittedGalleries() const;
   virtual void OnAddFolderClicked();
   virtual void DidToggleGallery(const MediaGalleryPrefInfo* pref_info,
                                 bool enabled);
   virtual void DialogFinished(bool accepted);
   virtual const KnownGalleryPermissions& permissions() const;
+  virtual content::WebContents* web_contents() const;
 
   // SelectFileDialog::Listener implementation:
   virtual void FileSelected(const FilePath& path,
                             int index,
                             void* params) OVERRIDE;
-  content::WebContents* web_contents() const {
-    return web_contents_;
-  }
 
  protected:
   // For use with tests.
   MediaGalleriesDialogController();
 
   virtual ~MediaGalleriesDialogController();
 
  private:
   // This type is for media galleries that have been added via "add gallery"
   // button, but have not yet been committed to the prefs system and will be
@@ skipping 29 matching lines @@
   scoped_ptr<MediaGalleriesDialog> dialog_;
 
   scoped_refptr<ui::SelectFileDialog> select_folder_dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaGalleriesDialogController);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERY_MEDIA_GALLERIES_DIALOG_CONTROLLER_H_