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diff --git a/WebCore/fileapi/DOMFilePath.h b/WebCore/fileapi/DOMFilePath.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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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 DOMFilePath_h
+#define DOMFilePath_h
+
+#include "PlatformString.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+// DOMFileSystem path utilities. All methods in this class are static.
+class DOMFilePath {
+public:
+    static const char separator;
+    static const char root[];
+
+    // Returns the name part from the given path.
+    static String getName(const String& path);
+
+    // Returns the parent directory path of the given path.
+    static String getDirectory(const String& path);
+
+    // Checks if a given path is a parent of mayBeChild. This method assumes given paths are absolute and do not have extra references to a parent (i.e. "../").
+    static bool isParentOf(const String& path, const String& mayBeChild);
+
+    // Appends the separator at the end of the path if it's not there already.
+    static String ensureDirectoryPath(const String& path);
+
+    // Returns a new path by appending a separator and the supplied path component to the path.
+    static String append(const String& path, const String& component);
+
+    static bool isAbsolute(const String& path)
+    {
+        return path.startsWith(DOMFilePath::root);
+    }
+
+    static bool endsWithSeparator(const String& path)
+    {
+        return path[path.length() - 1] == DOMFilePath::separator;
+    }
+
+    // Evaluates all "../" and "./" segments.  Note that "/../" expands to "/", so you can't ever refer to anything above the root directory.
+    static String removeExtraParentReferences(const String& path);
+
+    // Checks if the given path follows the FileSystem API naming restrictions.
+    static bool isValidPath(const String& path);
+
+    // Checks if the given name follows the FileSystem API naming restrictions.
+    static bool isValidName(const String& name);
+
+private:
+    DOMFilePath() { }
+};
+
+} // namespace WebCore
+
+#endif // DOMFilePath_h