diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/js/ScriptString.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/ScriptString.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2008, 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 ScriptString_h
+#define ScriptString_h
+
+#include "JSDOMBinding.h"
+#include "PlatformString.h"
+#include <runtime/UString.h>
+#include <runtime/StringBuilder.h>
+
+namespace WebCore {
+
+class String;
+
+class ScriptString {
+public:
+    ScriptString() {}
+    ScriptString(const char* s) : m_str(s) {}
+    ScriptString(const String& s) : m_str(stringToUString(s)) {}
+    ScriptString(const JSC::UString& s) : m_str(s) {}
+
+    operator JSC::UString() const { return m_str; }
+    operator String() const { return ustringToString(m_str); }
+    const JSC::UString& ustring() const { return m_str; }
+
+    bool isNull() const { return m_str.isNull(); }
+    size_t size() const { return m_str.size(); }
+
+    ScriptString& operator=(const char* s)
+    {
+        m_str = s;
+        return *this;
+    }
+
+    ScriptString& operator+=(const String& s)
+    {
+        JSC::StringBuilder buffer;
+        buffer.append(m_str);
+        buffer.append(stringToUString(s));
+        m_str = buffer.build();
+        return *this;
+    }
+
+    bool operator==(const ScriptString& s) const
+    {
+        return m_str == s.m_str;
+    }
+
+    bool operator!=(const ScriptString& s) const
+    {
+        // Avoid exporting an extra symbol by re-using "==" operator.
+        return !(m_str == s.m_str);
+    }
+
+private:
+    JSC::UString m_str;
+};
+
+} // namespace WebCore
+
+#endif // ScriptString_h