reland r57885 with a fix for linux/views.

chrome/browser/gtk/gtk_util.cc

 // Copyright (c) 2010 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/gtk_util.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
 
 #include <cstdarg>
@@ skipping 1041 matching lines @@
 string16 GetStockPreferencesMenuLabel() {
   GtkStockItem stock_item;
   string16 preferences;
   if (gtk_stock_lookup(GTK_STOCK_PREFERENCES, &stock_item)) {
     const char16 kUnderscore[] = { '_', 0 };
     RemoveChars(UTF8ToUTF16(stock_item.label), kUnderscore, &preferences);
   }
   return preferences;
 }
 
+bool IsWidgetAncestryVisible(GtkWidget* widget) {
+  GtkWidget* parent = widget;
+  while (parent && GTK_WIDGET_VISIBLE(parent))
+    parent = parent->parent;
+  return !parent;
+}
+
 }  // namespace gtk_util