GTK: Do more GSEALing.

chrome/browser/ui/gtk/slide_animator_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/slide_animator_gtk.h"
 
 #include "ui/base/animation/animation.h"
 #include "ui/base/animation/slide_animation.h"
 #include "ui/base/gtk/gtk_expanded_container.h"
 
@@ skipping 101 matching lines @@
   return animation_->is_animating();
 }
 
 void SlideAnimatorGtk::AnimationProgressed(const ui::Animation* animation) {
   GtkRequisition req;
   gtk_widget_size_request(child_, &req);
 
   int showing_height = static_cast<int>(req.height *
                                         animation_->GetCurrentValue());
   if (direction_ == DOWN) {
-    if (widget_.get()->parent) {
+    if (gtk_widget_get_parent(widget_.get())) {
       gtk_expanded_container_move(GTK_EXPANDED_CONTAINER(widget_.get()),
                                   child_, 0, showing_height - req.height);
     }
     child_needs_move_ = false;
   }
   gtk_widget_set_size_request(widget_.get(), -1, showing_height);
 }
 
 void SlideAnimatorGtk::AnimationEnded(const ui::Animation* animation) {
   if (!animation_->IsShowing()) {
@@ skipping 11 matching lines @@
 // static
 void SlideAnimatorGtk::OnChildSizeAllocate(GtkWidget* child,
                                            GtkAllocation* allocation,
                                            SlideAnimatorGtk* slider) {
   if (slider->child_needs_move_) {
     gtk_expanded_container_move(GTK_EXPANDED_CONTAINER(slider->widget()),
                                 child, 0, -allocation->height);
     slider->child_needs_move_ = false;
   }
 }