AU: Beginnings of delta support

src/platform/update_engine/decompressing_file_writer.h

Index: src/platform/update_engine/decompressing_file_writer.h
diff --git a/src/platform/update_engine/decompressing_file_writer.h b/src/platform/update_engine/decompressing_file_writer.h
index 975ca3cccfaa4e845ddf1f318ddda8034411e54a..6f12e87b93e71c0d1d0c008dcc618bded508fe11 100644
--- a/src/platform/update_engine/decompressing_file_writer.h
+++ b/src/platform/update_engine/decompressing_file_writer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__
-#define UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__
 
 #include <zlib.h>
 #include "base/basictypes.h"
@@ -57,4 +57,4 @@ class GzipDecompressingFileWriter : public FileWriter {
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_DECOMPRESSING_FILE_WRITER_H__