Add gmock into our dependencies.

third_party/boost/boost/preprocessor/arithmetic/add.hpp

Index: third_party/boost/boost/preprocessor/arithmetic/add.hpp
diff --git a/third_party/boost/boost/preprocessor/arithmetic/add.hpp b/third_party/boost/boost/preprocessor/arithmetic/add.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..5a29f554f5724b0b5a8aeb50d44c5e00ddfc67d1
--- /dev/null
+++ b/third_party/boost/boost/preprocessor/arithmetic/add.hpp
@@ -0,0 +1,51 @@
+# /* 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_ARITHMETIC_ADD_HPP
+# define BOOST_PREPROCESSOR_ARITHMETIC_ADD_HPP
+#
+# include <boost/preprocessor/arithmetic/dec.hpp>
+# include <boost/preprocessor/arithmetic/inc.hpp>
+# include <boost/preprocessor/config/config.hpp>
+# include <boost/preprocessor/control/while.hpp>
+# include <boost/preprocessor/tuple/elem.hpp>
+#
+# /* BOOST_PP_ADD */
+#
+# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
+#    define BOOST_PP_ADD(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_ADD_P, BOOST_PP_ADD_O, (x, y)))
+# else
+#    define BOOST_PP_ADD(x, y) BOOST_PP_ADD_I(x, y)
+#    define BOOST_PP_ADD_I(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_ADD_P, BOOST_PP_ADD_O, (x, y)))
+# endif
+#
+# define BOOST_PP_ADD_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)
+#
+# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
+#    define BOOST_PP_ADD_O(d, xy) BOOST_PP_ADD_O_I xy
+# else
+#    define BOOST_PP_ADD_O(d, xy) BOOST_PP_ADD_O_I(BOOST_PP_TUPLE_ELEM(2, 0, xy), BOOST_PP_TUPLE_ELEM(2, 1, xy))
+# endif
+#
+# define BOOST_PP_ADD_O_I(x, y) (BOOST_PP_INC(x), BOOST_PP_DEC(y))
+#
+# /* BOOST_PP_ADD_D */
+#
+# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
+#    define BOOST_PP_ADD_D(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_ADD_P, BOOST_PP_ADD_O, (x, y)))
+# else
+#    define BOOST_PP_ADD_D(d, x, y) BOOST_PP_ADD_D_I(d, x, y)
+#    define BOOST_PP_ADD_D_I(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_ADD_P, BOOST_PP_ADD_O, (x, y)))
+# endif
+#
+# endif