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diff --git a/WebCore/page/AXObjectCache.h b/WebCore/page/AXObjectCache.h
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+++ b/WebCore/page/AXObjectCache.h
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+/*
+ * Copyright (C) 2003, 2006, 2007 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.
+ */
+
+#ifndef AXObjectCache_h
+#define AXObjectCache_h
+
+#include <limits.h>
+
+#include <wtf/HashMap.h>
+#include <wtf/HashSet.h>
+
+#ifdef __OBJC__
+@class WebCoreAXObject;
+@class WebCoreTextMarker;
+#else
+class WebCoreAXObject;
+class WebCoreTextMarker;
+#endif
+
+namespace WebCore {
+
+    class RenderObject;
+    class String;
+    class VisiblePosition;
+
+    typedef unsigned AXID;
+
+    struct AXIDHashTraits : WTF::GenericHashTraits<unsigned> {
+        static TraitType deletedValue() { return UINT_MAX; }
+    };
+
+    class AXObjectCache {
+    public:
+        ~AXObjectCache();
+
+        WebCoreAXObject* get(RenderObject*);
+        void remove(RenderObject*);
+
+        void removeAXID(WebCoreAXObject*);
+
+        WebCoreTextMarker* textMarkerForVisiblePosition(const VisiblePosition&);
+        VisiblePosition visiblePositionForTextMarker(WebCoreTextMarker*);
+        
+        void childrenChanged(RenderObject*);
+        void postNotification(RenderObject*, const String& message);
+        void postNotificationToElement(RenderObject*, const String& message);
+        void handleFocusedUIElementChanged();
+        
+#if PLATFORM(MAC)
+        static void enableAccessibility() { gAccessibilityEnabled = true; }
+        static bool accessibilityEnabled() { return gAccessibilityEnabled; }
+#else
+        static bool accessibilityEnabled() { return false; }
+#endif
+
+    private:
+#if PLATFORM(MAC)
+        static bool gAccessibilityEnabled;
+#endif
+
+        AXID getAXID(WebCoreAXObject*);
+
+        HashMap<RenderObject*, WebCoreAXObject*> m_objects;
+        HashSet<AXID, IntHash<AXID>, AXIDHashTraits> m_idsInUse;
+    };
+
+#if !PLATFORM(MAC)
+    inline AXObjectCache::~AXObjectCache() { }
+    inline WebCoreAXObject* AXObjectCache::get(RenderObject*) { return 0; }
+    inline void AXObjectCache::remove(RenderObject*) { }
+    inline void AXObjectCache::removeAXID(WebCoreAXObject*) { }
+    inline void AXObjectCache::childrenChanged(RenderObject*) { }
+    inline void AXObjectCache::postNotification(RenderObject*, const String&) { }
+    inline void AXObjectCache::postNotificationToElement(RenderObject*, const String&) { }
+    inline void AXObjectCache::handleFocusedUIElementChanged() { }
+#endif
+
+}
+
+#endif