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diff --git a/Source/WebCore/bindings/objc/DOMObject.mm b/Source/WebCore/bindings/objc/DOMObject.mm
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+++ b/Source/WebCore/bindings/objc/DOMObject.mm
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+/*
+ * Copyright (C) 2004, 2006, 2006, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2006 James G. Speth <speth@end.com>
+ * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
+ *
+ * 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. 
+ */
+
+#import "config.h"
+#import "DOMObject.h"
+
+#import "DOMHTMLLinkElementInternal.h"
+#import "DOMHTMLStyleElementInternal.h"
+#import "DOMInternal.h"
+#import "DOMProcessingInstructionInternal.h"
+#import "DOMStyleSheetInternal.h"
+#import "HTMLLinkElement.h"
+#import "HTMLStyleElement.h"
+#import "ProcessingInstruction.h"
+#import "StyleSheet.h"
+#import "WebScriptObjectPrivate.h"
+#import <wtf/UnusedParam.h>
+
+@implementation DOMObject
+
+// Prevent creation of DOM objects by clients who just "[[xxx alloc] init]".
+- (id)init
+{
+    [NSException raise:NSGenericException format:@"+[%@ init]: should never be used", NSStringFromClass([self class])];
+    [self release];
+    return nil;
+}
+
+- (void)dealloc
+{
+    if (_internal)
+        removeDOMWrapper(_internal);
+    [super dealloc];
+}
+
+- (id)copyWithZone:(NSZone *)unusedZone
+{
+    UNUSED_PARAM(unusedZone);
+    return [self retain];
+}
+
+@end
+
+@implementation DOMObject (DOMLinkStyle)
+
+- (DOMStyleSheet *)sheet
+{
+    WebCore::StyleSheet* styleSheet;
+
+    if ([self isKindOfClass:[DOMProcessingInstruction class]])
+        styleSheet = core(static_cast<DOMProcessingInstruction *>(self))->sheet();
+    else if ([self isKindOfClass:[DOMHTMLLinkElement class]])
+        styleSheet = core(static_cast<DOMHTMLLinkElement *>(self))->sheet();
+    else if ([self isKindOfClass:[DOMHTMLStyleElement class]])
+        styleSheet = core(static_cast<DOMHTMLStyleElement *>(self))->sheet();
+    else
+        return nil;
+
+    return kit(styleSheet);
+}
+
+@end