Add gmock into our dependencies.

third_party/boost/boost/preprocessor/list/fold_right.hpp

Index: third_party/boost/boost/preprocessor/list/fold_right.hpp
diff --git a/third_party/boost/boost/preprocessor/list/fold_right.hpp b/third_party/boost/boost/preprocessor/list/fold_right.hpp
new file mode 100644
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+++ b/third_party/boost/boost/preprocessor/list/fold_right.hpp
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+# /* Copyright (C) 2001
+#  * Housemarque Oy
+#  * http://www.housemarque.com
+#  *
+#  * 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)
+#  */
+#
+# /* Revised by Paul Mensonides (2002) */
+#
+# /* See http://www.boost.org for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_LIST_FOLD_RIGHT_HPP
+# define BOOST_PREPROCESSOR_LIST_FOLD_RIGHT_HPP
+#
+# include <boost/preprocessor/cat.hpp>
+# include <boost/preprocessor/control/while.hpp>
+# include <boost/preprocessor/debug/error.hpp>
+# include <boost/preprocessor/detail/auto_rec.hpp>
+#
+# if 0
+#    define BOOST_PP_LIST_FOLD_RIGHT(op, state, list)
+# endif
+#
+# define BOOST_PP_LIST_FOLD_RIGHT BOOST_PP_CAT(BOOST_PP_LIST_FOLD_RIGHT_, BOOST_PP_AUTO_REC(BOOST_PP_WHILE_P, 256))
+#
+# define BOOST_PP_LIST_FOLD_RIGHT_257(o, s, l) BOOST_PP_ERROR(0x0004)
+#
+# define BOOST_PP_LIST_FOLD_RIGHT_D(d, o, s, l) BOOST_PP_LIST_FOLD_RIGHT_ ## d(o, s, l)
+# define BOOST_PP_LIST_FOLD_RIGHT_2ND BOOST_PP_LIST_FOLD_RIGHT
+# define BOOST_PP_LIST_FOLD_RIGHT_2ND_D BOOST_PP_LIST_FOLD_RIGHT_D
+#
+# if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
+#    include <boost/preprocessor/list/detail/edg/fold_right.hpp>
+# else
+#    include <boost/preprocessor/list/detail/fold_right.hpp>
+# endif
+#
+# endif