Move Courgette from internal depot to third_party.

third_party/courgette/simple_delta.h

Index: third_party/courgette/simple_delta.h
===================================================================
--- third_party/courgette/simple_delta.h	(revision 0)
+++ third_party/courgette/simple_delta.h	(revision 0)
@@ -0,0 +1,23 @@
+// Copyright (c) 2009 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.
+
+// Byte level differential compression algorithm used by Courgette.
+
+#ifndef COURGETTE_SIMPLE_DELTA_H_
+#define COURGETTE_SIMPLE_DELTA_H_
+
+#include "third_party/courgette/courgette.h"
+#include "third_party/courgette/streams.h"
+
+namespace courgette {
+
+Status ApplySimpleDelta(SourceStream* old, SourceStream* delta,
+                        SinkStream* target);
+
+Status GenerateSimpleDelta(SourceStream* old, SourceStream* target,
+                           SinkStream* delta);
+
+}  // namespace courgette
+
+#endif  // COURGETTE_SIMPLE_DELTA_H_