Allows client to access auth token from command line specified file.

blimp/common/switches.h

Index: blimp/common/switches.h
diff --git a/blimp/common/switches.h b/blimp/common/switches.h
new file mode 100644
index 0000000000000000000000000000000000000000..e29bd335647dc606bbcbcbe580cba1c5ada5171a
--- /dev/null
+++ b/blimp/common/switches.h
@@ -0,0 +1,17 @@
+// Copyright 2016 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.
+
+#ifndef BLIMP_COMMON_SWITCHES_H_
+#define BLIMP_COMMON_SWITCHES_H_
+
+#include "blimp/common/blimp_common_export.h"
+
+namespace blimp {
+
+// Path to the client token/shared secret between the Engine and the Client.
+extern BLIMP_COMMON_EXPORT const char kClientTokenPath[];
+
+}  // namespace blimp
+
+#endif  // BLIMP_COMMON_SWITCHES_H_