fixed the DCHECK and also corrected the website setting UI for media

chrome/browser/ui/gtk/website_settings/website_settings_popup_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/website_settings/website_settings_popup_gtk.h"
 
 #include "base/i18n/rtl.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/certificate_viewer.h"
@@ skipping 582 matching lines @@
   // Clear the map since the UI is reconstructed.
   selectors_.clear();
 
   for (PermissionInfoList::const_iterator permission =
            permission_info_list.begin();
        permission != permission_info_list.end();
        ++permission) {
     PermissionSelector* selector =
         new PermissionSelector(
            theme_service_,
+           web_contents_ ? web_contents_->GetURL() : GURL::EmptyGURL(),
            permission->type,
            permission->setting,
            permission->default_setting,
            permission->source);
     selector->AddObserver(this);
     GtkWidget* hbox = selector->widget();
     selectors_.push_back(selector);
     gtk_box_pack_start(GTK_BOX(permissions_section_contents_), hbox, FALSE,
                        FALSE, 0);
   }
@@ skipping 125 matching lines @@
 }
 
 void WebsiteSettingsPopupGtk::OnHelpLinkClicked(GtkWidget* widget) {
   browser_->OpenURL(OpenURLParams(GURL(chrome::kPageInfoHelpCenterURL),
                     content::Referrer(),
                     NEW_FOREGROUND_TAB,
                     content::PAGE_TRANSITION_LINK,
                      false));
   bubble_->Close();
 }