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diff --git a/Source/WebKit/chromium/public/WebIDBCursor.h b/Source/WebKit/chromium/public/WebIDBCursor.h
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+++ b/Source/WebKit/chromium/public/WebIDBCursor.h
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+/*
+ * Copyright (C) 2010 Google 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 AND ITS CONTRIBUTORS "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 OR ITS 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 WebIDBCursor_h
+#define WebIDBCursor_h
+
+#include "WebExceptionCode.h"
+#include "WebIDBCallbacks.h"
+#include "WebIDBKey.h"
+#include "platform/WebCommon.h"
+#include "platform/WebSerializedScriptValue.h"
+#include "platform/WebString.h"
+
+namespace WebKit {
+
+// See comment in WebIDBFactory for a high level overview these classes.
+class WebIDBCursor {
+public:
+    virtual ~WebIDBCursor() { }
+
+    virtual unsigned short direction() const
+    {
+        WEBKIT_ASSERT_NOT_REACHED();
+        return 0;
+    }
+    virtual WebIDBKey key() const
+    {
+        WEBKIT_ASSERT_NOT_REACHED();
+        return WebIDBKey::createInvalid();
+    }
+    virtual WebIDBKey primaryKey() const
+    {
+        WEBKIT_ASSERT_NOT_REACHED();
+        return WebIDBKey::createInvalid();
+    }
+    virtual WebSerializedScriptValue value() const
+    {
+        WEBKIT_ASSERT_NOT_REACHED();
+        return WebSerializedScriptValue();
+    }
+
+    virtual void update(const WebSerializedScriptValue&, WebIDBCallbacks*, WebExceptionCode&) { WEBKIT_ASSERT_NOT_REACHED(); }
+    virtual void continueFunction(const WebIDBKey&, WebIDBCallbacks*, WebExceptionCode&) { WEBKIT_ASSERT_NOT_REACHED(); }
+    virtual void deleteFunction(WebIDBCallbacks*, WebExceptionCode&) { WEBKIT_ASSERT_NOT_REACHED(); }
+    virtual void prefetchContinue(int numberToFetch, WebIDBCallbacks*, WebExceptionCode&) { WEBKIT_ASSERT_NOT_REACHED(); }
+    virtual void prefetchReset(int usedPrefetches, int unusedPrefetches) { WEBKIT_ASSERT_NOT_REACHED(); }
+    virtual void postSuccessHandlerCallback() { } // Only used in frontend.
+
+protected:
+    WebIDBCursor() { }
+};
+
+} // namespace WebKit
+
+#endif // WebIDBCursor_h