gtk: Use gtk_dialog_get_content_area() throughout.

chrome/browser/ui/gtk/create_application_shortcuts_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/gtk/create_application_shortcuts_dialog_gtk.h"
 
 #include <string>
 
 #include "base/environment.h"
 #include "base/utf_string_conversions.h"
@@ skipping 82 matching lines @@
       NULL);
   gtk_widget_realize(create_dialog_);
   gtk_window_set_resizable(GTK_WINDOW(create_dialog_), false);
   gtk_util::AddButtonToDialog(create_dialog_,
       l10n_util::GetStringUTF8(IDS_CANCEL).c_str(),
       GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT);
   gtk_util::AddButtonToDialog(create_dialog_,
       l10n_util::GetStringUTF8(IDS_CREATE_SHORTCUTS_COMMIT).c_str(),
       GTK_STOCK_APPLY, GTK_RESPONSE_ACCEPT);
 
-  GtkWidget* content_area = GTK_DIALOG(create_dialog_)->vbox;
+  GtkWidget* content_area =
+      gtk_dialog_get_content_area(GTK_DIALOG(create_dialog_));
   gtk_box_set_spacing(GTK_BOX(content_area), gtk_util::kContentAreaSpacing);
 
   GtkWidget* vbox = gtk_vbox_new(FALSE, gtk_util::kControlSpacing);
   gtk_container_add(GTK_CONTAINER(content_area), vbox);
 
   // Create a box containing basic information about the new shortcut: an image
   // on the left, and a description on the right.
   GtkWidget* hbox = gtk_hbox_new(FALSE, gtk_util::kControlSpacing);
   gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
   gtk_container_set_border_width(GTK_CONTAINER(hbox),
@@ skipping 119 matching lines @@
       (GtkDialogFlags) (GTK_DIALOG_NO_SEPARATOR),
       GTK_STOCK_OK,
       GTK_RESPONSE_ACCEPT,
       NULL);
   gtk_widget_realize(error_dialog_);
   gtk_util::SetWindowSizeFromResources(
       GTK_WINDOW(error_dialog_),
       IDS_CREATE_SHORTCUTS_ERROR_DIALOG_WIDTH_CHARS,
       IDS_CREATE_SHORTCUTS_ERROR_DIALOG_HEIGHT_LINES,
       false);  // resizable
-  GtkWidget* content_area = GTK_DIALOG(error_dialog_)->vbox;
+  GtkWidget* content_area =
+      gtk_dialog_get_content_area(GTK_DIALOG(error_dialog_));
   gtk_box_set_spacing(GTK_BOX(content_area), gtk_util::kContentAreaSpacing);
 
   GtkWidget* vbox = gtk_vbox_new(FALSE, gtk_util::kControlSpacing);
   gtk_container_add(GTK_CONTAINER(content_area), vbox);
 
   // Label on top of the checkboxes.
   GtkWidget* description = gtk_label_new(
       l10n_util::GetStringFUTF8(
           IDS_CREATE_SHORTCUTS_ERROR_LABEL,
           l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)).c_str());
@@ skipping 73 matching lines @@
 void CreateChromeApplicationShortcutsDialogGtk::OnImageLoaded(
     SkBitmap* image, const ExtensionResource& resource, int index) {
   if (!image || image->isNull())
     image = ExtensionIconSource::LoadImageByResourceId(IDR_APP_DEFAULT_ICON);
 
   shortcut_info_.favicon = *image;
 
   CreateIconPixBuf(*image);
   CreateDialogBox(parent_);
 }