GTK: More raw struct access removal, this time focusing on GtkDialog.

chrome/browser/ui/gtk/bookmarks/bookmark_bar_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/bookmarks/bookmark_bar_gtk.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 416 matching lines @@
     AnimationProgressed(&slide_animation_);
   }
 
   if (model_ && model_->IsLoaded())
     UpdateOtherBookmarksVisibility();
 
   // Hide out behind the findbar. This is rather fragile code, it could
   // probably be improved.
   if (bookmark_bar_state_ == BookmarkBar::DETACHED) {
     if (theme_service_->UsingNativeTheme()) {
-      if (gtk_widget_get_realized(event_box_->parent))
-        gdk_window_lower(event_box_->parent->window);
+      GtkWidget* parent = gtk_widget_get_parent(event_box_.get());
+      if (gtk_widget_get_realized(parent))
+        gdk_window_lower(gtk_widget_get_window(parent));
       if (gtk_widget_get_realized(event_box_.get()))
-        gdk_window_lower(event_box_->window);
+        gdk_window_lower(gtk_widget_get_window(event_box_.get()));
     } else {  // Chromium theme mode.
       if (gtk_widget_get_realized(paint_box_)) {
-        gdk_window_lower(paint_box_->window);
+        gdk_window_lower(gtk_widget_get_window(paint_box_));
         // The event box won't stay below its children's GdkWindows unless we
         // toggle the above-child property here. If the event box doesn't stay
         // below its children then events will be routed to it rather than the
         // children.
         gtk_event_box_set_above_child(GTK_EVENT_BOX(event_box_.get()), TRUE);
         gtk_event_box_set_above_child(GTK_EVENT_BOX(event_box_.get()), FALSE);
       }
     }
   }
 
@@ skipping 987 matching lines @@
 void BookmarkBarGtk::OnEditBookmarksEnabledChanged() {
   GtkDestDefaults dest_defaults =
       *edit_bookmarks_enabled_ ? GTK_DEST_DEFAULT_ALL :
                                  GTK_DEST_DEFAULT_DROP;
   gtk_drag_dest_set(overflow_button_, dest_defaults, NULL, 0, kDragAction);
   gtk_drag_dest_set(other_bookmarks_button_, dest_defaults,
                     NULL, 0, kDragAction);
   ui::SetDestTargetList(overflow_button_, kDestTargetList);
   ui::SetDestTargetList(other_bookmarks_button_, kDestTargetList);
 }