Add gmock into our dependencies.

third_party/boost/boost/non_type.hpp

Index: third_party/boost/boost/non_type.hpp
diff --git a/third_party/boost/boost/non_type.hpp b/third_party/boost/boost/non_type.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..896aed4d34b8d68bf3d8fd363834abca68e4b189
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+++ b/third_party/boost/boost/non_type.hpp
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+// -------------------------------------
+//
+//           (C) Copyright Gennaro Prota 2003.
+//
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+//
+// ------------------------------------------------------
+
+#ifndef BOOST_NON_TYPE_HPP_GP_20030417
+#define BOOST_NON_TYPE_HPP_GP_20030417
+
+
+namespace boost {
+
+  // Just a simple "envelope" for non-type template parameters. Useful
+  // to work around some MSVC deficiencies.
+
+ template <typename T, T n>
+ struct non_type { };
+
+
+}
+
+
+#endif // include guard