GTK: Directly allocate widgets that are children of GtkFixed.

chrome/browser/gtk/find_bar_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/find_bar_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include "base/gfx/gtk_util.h"
 #include "base/string_util.h"
@@ skipping 224 matching lines @@
     NOTREACHED();
   }
 }
 
 // static
 void FindBarGtk::OnSizeAllocate(GtkWidget* fixed,
                                 GtkAllocation* allocation,
                                 FindBarGtk* findbar) {
   // Set the background widget to the size of |fixed|.
   if (findbar->border_->allocation.width != allocation->width) {
-    gtk_widget_set_size_request(findbar->border_, allocation->width, 1);
+    // Typically it's not a good idea to use this function outside of container
+    // implementations, but GtkFixed doesn't do any sizing on its children so
+    // in this case it's safe.
+    gtk_widget_size_allocate(findbar->border_, allocation);
   }
 
   // Reposition |container_|.
   GtkWidget* container = findbar->container_;
   DCHECK(container);
   if (!GTK_WIDGET_VISIBLE(container))
     return;
 
   int xposition = findbar->GetDialogPosition(gfx::Rect()).x();
   if (xposition == container->allocation.x) {
     return;
   } else {
     gtk_fixed_move(GTK_FIXED(fixed), container, xposition, kVerticalOffset);
   }
 }