AU: Beginnings of delta support

src/platform/update_engine/omaha_hash_calculator.h

Index: src/platform/update_engine/omaha_hash_calculator.h
diff --git a/src/platform/update_engine/omaha_hash_calculator.h b/src/platform/update_engine/omaha_hash_calculator.h
index 28602a3829d9daa7b87ae0fb6723e1b67bb20383..c96f75ecde36dfc789be626b1e985b7324dd77ca 100644
--- a/src/platform/update_engine/omaha_hash_calculator.h
+++ b/src/platform/update_engine/omaha_hash_calculator.h
@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__
-#define UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__
 
 #include "base/basictypes.h"
 #include <string>
+#include <vector>
 #include <openssl/sha.h>
 
 // Omaha uses base64 encoded SHA-1 as the hash. This class provides a simple
@@ -53,4 +54,4 @@ class OmahaHashCalculator {
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_HASH_CALCULATOR_H__