Fix a bug where we get an extra resize event for background tabs.

chrome/browser/gtk/tab_contents_container_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/tab_contents_container_gtk.h"
 
 #include "app/l10n_util.h"
 #include "base/gfx/native_widget_types.h"
 #include "chrome/browser/gtk/gtk_floating_container.h"
 #include "chrome/browser/gtk/status_bubble_gtk.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 #include "chrome/common/notification_service.h"
 
 namespace {
 
 // Allocates all normal tab contents views to the size of the passed in
 // |allocation|.
 void ResizeChildren(GtkWidget* widget, void* param) {
   GtkAllocation* allocation = reinterpret_cast<GtkAllocation*>(param);
+  if (!GTK_WIDGET_VISIBLE(widget))
+    return;
 
   if (widget->allocation.width != allocation->width ||
       widget->allocation.height != allocation->height) {
     gtk_widget_set_size_request(widget, allocation->width,
                                 allocation->height);
   }
 }
 
 }  // namespace
 
@@ skipping 171 matching lines @@
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    status, "x", &value);
 
   int child_y = std::max(
       allocation->y + allocation->height - requisition.height, 0);
   g_value_set_int(&value, child_y);
   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
                                    status, "y", &value);
   g_value_unset(&value);
 }