Added webrtc/base/safe_conversions.h as a pseudonym

webrtc/base/safe_conversions.h

Index: webrtc/base/safe_conversions.h
diff --git a/webrtc/base/safe_conversions.h b/webrtc/base/safe_conversions.h
new file mode 100644
index 0000000000000000000000000000000000000000..accc8a9a673ab8e69cfc1eb9146c79e6cae1dec8
--- /dev/null
+++ b/webrtc/base/safe_conversions.h
@@ -0,0 +1,21 @@
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ *
+ */
+
+#ifndef WEBRTC_BASE_SAFE_CONVERSIONS_H_
+#define WEBRTC_BASE_SAFE_CONVERSIONS_H_
+
+// TODO(hbos): This file has been replaced by the file being included below.
+// It exists as to not break downstream projects before they have been updated
+// to use the new file path. As soon as the new file path is used, this file
+// should be removed. webrtc:5548
+#include "webrtc/base/numerics/safe_conversions.h"
+
+#endif  // WEBRTC_BASE_SAFE_CONVERSIONS_H_