GTK: More GSEALing.

chrome/browser/tab_contents/chrome_tab_contents_view_wrapper_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/tab_contents/chrome_tab_contents_view_wrapper_gtk.h"
 
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/tab_contents/render_view_context_menu_gtk.h"
 #include "chrome/browser/tab_contents/tab_contents_view_gtk.h"
 #include "chrome/browser/tab_contents/web_drag_bookmark_handler_gtk.h"
@@ skipping 122 matching lines @@
   context_menu_->Popup(point);
 }
 
 void ChromeTabContentsViewWrapperGtk::OnSetFloatingPosition(
     GtkWidget* floating_container, GtkAllocation* allocation) {
   if (!constrained_window_)
     return;
 
   // Place each ConstrainedWindow in the center of the view.
   GtkWidget* widget = constrained_window_->widget();
-  DCHECK(widget->parent == floating_.get());
+  DCHECK(gtk_widget_get_parent(widget) == floating_.get());
 
   GtkRequisition requisition;
   gtk_widget_size_request(widget, &requisition);
 
   GValue value = { 0, };
   g_value_init(&value, G_TYPE_INT);
 
   int child_x = std::max((allocation->width - requisition.width) / 2, 0);
   g_value_set_int(&value, child_x);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "x", &value);
 
   int child_y = std::max((allocation->height - requisition.height) / 2, 0);
   g_value_set_int(&value, child_y);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    widget, "y", &value);
   g_value_unset(&value);
 }