GTK: Directly allocate widgets that are children of GtkFixed.

chrome/browser/gtk/slide_animator_gtk.cc

 // Copyright (c) 2009 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/gtk/slide_animator_gtk.h"
 
 #include "base/logging.h"
 #include "chrome/common/animation.h"
 #include "chrome/common/slide_animation.h"
 
 namespace {
 
 void OnFixedSizeAllocate(GtkWidget* fixed,
                          GtkAllocation* allocation,
                          GtkWidget* child) {
-  gint height;
-  gtk_widget_get_size_request(child, NULL, &height);
   // The size of the GtkFixed has changed. We want |child_| to match widths,
-  // but the height should always be |widget_height_|.
-  gtk_widget_set_size_request(child, allocation->width, height);
+  // but the height should not change.
+  GtkAllocation new_allocation = child->allocation;
+  new_allocation.width = allocation->width;
+  gtk_widget_size_allocate(child, &new_allocation);
 }
 
 }  // namespace
 
 SlideAnimatorGtk::SlideAnimatorGtk(GtkWidget* child,
                                    Direction direction,
                                    int duration,
                                    bool linear,
                                    Delegate* delegate)
     : child_(child),
@@ skipping 68 matching lines @@
 // static
 void SlideAnimatorGtk::OnChildSizeAllocate(GtkWidget* child,
                                            GtkAllocation* allocation,
                                            SlideAnimatorGtk* slider) {
   if (!slider->fixed_needs_resize_)
     return;
 
   slider->fixed_needs_resize_ = false;
   slider->AnimationProgressed(slider->animation_.get());
 }