gtk: Use gtk_dialog_get_content_area() throughout.

chrome/browser/ui/gtk/hung_renderer_dialog_gtk.cc

 // Copyright (c) 2011 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/browser_dialogs.h"
 
 #include <gtk/gtk.h>
 
 #include "base/process_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 81 matching lines @@
   // |||icon|||                        |||
   // ||·----·|| The folowing page(s).. |||
   // ||      ||                        |||
   // ||      ||------------------------|||
   // ||      || table of tabs          |||
   // ||      |·------------------------·||
   // |·---------------------------------·|
   // |                                   |
   // |         kill button    wait button|
   // ·-----------------------------------·
-  GtkWidget* contents_vbox = dialog_->vbox;
-  gtk_box_set_spacing(GTK_BOX(contents_vbox), gtk_util::kContentAreaSpacing);
+  GtkWidget* content_area = gtk_dialog_get_content_area(dialog_);
+  gtk_box_set_spacing(GTK_BOX(content_area), gtk_util::kContentAreaSpacing);
 
   GtkWidget* hbox = gtk_hbox_new(FALSE, 12);
-  gtk_box_pack_start(GTK_BOX(contents_vbox), hbox, TRUE, TRUE, 0);
+  gtk_box_pack_start(GTK_BOX(content_area), hbox, TRUE, TRUE, 0);
 
   // Wrap the icon in a vbox so it stays top aligned.
   GtkWidget* icon_vbox = gtk_vbox_new(FALSE, 0);
   gtk_box_pack_start(GTK_BOX(hbox), icon_vbox, FALSE, FALSE, 0);
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   GdkPixbuf* icon_pixbuf = rb.GetNativeImageNamed(IDR_FROZEN_TAB_ICON);
   GtkWidget* icon = gtk_image_new_from_pixbuf(icon_pixbuf);
   gtk_box_pack_start(GTK_BOX(icon_vbox), icon, FALSE, FALSE, 0);
 
   GtkWidget* vbox = gtk_vbox_new(FALSE, gtk_util::kControlSpacing);
@@ skipping 107 matching lines @@
     g_instance->ShowForTabContents(contents);
   }
 }
 
 void HideHungRendererDialog(TabContents* contents) {
   if (!logging::DialogsAreSuppressed() && g_instance)
     g_instance->EndForTabContents(contents);
 }
 
 }  // namespace browser