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diff --git a/url/url_canon_icu.h b/url/url_canon_icu.h
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+// Copyright 2011, 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.
+
+// ICU integration functions.
+
+#ifndef GOOGLEURL_SRC_URL_CANON_ICU_H__
+#define GOOGLEURL_SRC_URL_CANON_ICU_H__
+
+#include "googleurl/src/url_canon.h"
+
+typedef struct UConverter UConverter;
+
+namespace url_canon {
+
+// An implementation of CharsetConverter that implementations can use to
+// interface the canonicalizer with ICU's conversion routines.
+class ICUCharsetConverter : public CharsetConverter {
+ public:
+  // Constructs a converter using an already-existing ICU character set
+  // converter. This converter is NOT owned by this object; the lifetime must
+  // be managed by the creator such that it is alive as long as this is.
+  GURL_API ICUCharsetConverter(UConverter* converter);
+
+  GURL_API virtual ~ICUCharsetConverter();
+
+  GURL_API virtual void ConvertFromUTF16(const char16* input,
+                                         int input_len,
+                                         CanonOutput* output);
+
+ private:
+  // The ICU converter, not owned by this class.
+  UConverter* converter_;
+};
+
+}  // namespace url_canon
+
+#endif  // GOOGLEURL_SRC_URL_CANON_ICU_H__