diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/js/JSStyleSheetCustom.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/JSStyleSheetCustom.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "JSStyleSheet.h"
+
+#include "CSSStyleSheet.h"
+#include "Node.h"
+#include "JSCSSStyleSheet.h"
+#include "JSNode.h"
+
+using namespace JSC;
+
+namespace WebCore {
+
+JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, StyleSheet* styleSheet)
+{
+    if (!styleSheet)
+        return jsNull();
+
+    DOMObject* wrapper = getCachedDOMObjectWrapper(exec, styleSheet);
+    if (wrapper)
+        return wrapper;
+
+    if (styleSheet->isCSSStyleSheet())
+        wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, CSSStyleSheet, styleSheet);
+    else
+        wrapper = CREATE_DOM_OBJECT_WRAPPER(exec, globalObject, StyleSheet, styleSheet);
+
+    return wrapper;
+}
+
+void JSStyleSheet::markChildren(MarkStack& markStack)
+{
+    Base::markChildren(markStack);
+
+    StyleSheet* sheet = impl();
+    JSGlobalData& globalData = *Heap::heap(this)->globalData();
+
+    unsigned length = sheet->length();
+    for (unsigned i = 0; i < length; ++i)
+        markDOMObjectWrapper(markStack, globalData, sheet->item(i));
+
+    // This prevents us from having a style sheet with a dangling ownerNode pointer.
+    // A better solution would be to handle this on the DOM side -- if the style sheet
+    // is kept around, then we want the node to stay around too. One possibility would
+    // be to make ref/deref on the style sheet ref/deref the node instead, but there's
+    // a lot of disentangling of the CSS DOM objects that would need to happen first.
+    if (Node* ownerNode = sheet->ownerNode())
+        markDOMNodeWrapper(markStack, ownerNode->document(), ownerNode);
+}
+
+} // namespace WebCore