Missed new files in last commit

src/platform/update_engine/generate_delta_main.cc

Index: src/platform/update_engine/generate_delta_main.cc
diff --git a/src/platform/update_engine/generate_delta_main.cc b/src/platform/update_engine/generate_delta_main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..14af193a9eb2d1b451d19e091a578f127f08c021
--- /dev/null
+++ b/src/platform/update_engine/generate_delta_main.cc
@@ -0,0 +1,48 @@
+// 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.
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <algorithm>
+#include <string>
+#include <vector>
+#include <tr1/memory>
+
+#include <glib.h>
+
+#include "chromeos/obsolete_logging.h"
+#include "update_engine/subprocess.h"
+#include "update_engine/update_metadata.pb.h"
+
+using std::sort;
+using std::string;
+using std::vector;
+using std::tr1::shared_ptr;
+
+// This file contains a simple program that takes an old path, a new path,
+// and an output file as arguments and the path to an output file and
+// generates a delta that can be sent to Chrome OS clients.
+
+namespace chromeos_update_engine {
+
+int main(int argc, char** argv) {
+  g_thread_init(NULL);
+  Subprocess::Init();
+  if (argc != 4) {
+    usage(argv[0]);
+  }
+  const char* old_dir = argv[1];
+  const char* new_dir = argv[2];
+  if ((!IsDir(old_dir)) || (!IsDir(new_dir))) {
+    usage(argv[0]);
+  }
+  // TODO(adlr): implement using DeltaDiffGenerator
+  return 0;
+}