Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/lib/crc32.h

Index: rlz/lib/crc32.h
===================================================================
--- rlz/lib/crc32.h	(revision 0)
+++ rlz/lib/crc32.h	(revision 0)
@@ -0,0 +1,17 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// A wrapper around ZLib's CRC function.
+
+#ifndef RLZ_LIB_CRC32_H_
+#define RLZ_LIB_CRC32_H_
+
+namespace rlz_lib {
+
+int Crc32(const unsigned char* buf, int length);
+bool Crc32(const char* text, int* crc);
+
+}  // namespace rlz_lib
+
+#endif  // RLZ_LIB_CRC32_H_