Add gmock into our dependencies.

third_party/boost/boost/preprocessor/config/config.hpp

Index: third_party/boost/boost/preprocessor/config/config.hpp
diff --git a/third_party/boost/boost/preprocessor/config/config.hpp b/third_party/boost/boost/preprocessor/config/config.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..dd0f7138d03473d846fe70e78c14959da5973d51
--- /dev/null
+++ b/third_party/boost/boost/preprocessor/config/config.hpp
@@ -0,0 +1,70 @@
+# /* **************************************************************************
+#  *                                                                          *
+#  *     (C) Copyright Paul Mensonides 2002.
+#  *     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)
+#  *                                                                          *
+#  ************************************************************************** */
+#
+# /* See http://www.boost.org for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_CONFIG_CONFIG_HPP
+# define BOOST_PREPROCESSOR_CONFIG_CONFIG_HPP
+#
+# /* BOOST_PP_CONFIG_FLAGS */
+#
+# define BOOST_PP_CONFIG_STRICT() 0x0001
+# define BOOST_PP_CONFIG_IDEAL() 0x0002
+#
+# define BOOST_PP_CONFIG_MSVC() 0x0004
+# define BOOST_PP_CONFIG_MWCC() 0x0008
+# define BOOST_PP_CONFIG_BCC() 0x0010
+# define BOOST_PP_CONFIG_EDG() 0x0020
+# define BOOST_PP_CONFIG_DMC() 0x0040
+#
+# ifndef BOOST_PP_CONFIG_FLAGS
+#    if defined(__GCCXML__)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_STRICT())
+#    elif defined(__WAVE__)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_STRICT())
+#    elif defined(__MWERKS__) && __MWERKS__ >= 0x3200
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_STRICT())
+#    elif defined(__EDG__) || defined(__EDG_VERSION__)
+#        if defined(_MSC_VER) && __EDG_VERSION__ >= 308
+#            define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_MSVC())
+#        else
+#            define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_EDG() | BOOST_PP_CONFIG_STRICT())
+#        endif
+#    elif defined(__MWERKS__)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_MWCC())
+#    elif defined(__DMC__)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_DMC())
+#    elif defined(__BORLANDC__) && __BORLANDC__ >= 0x581
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_STRICT())
+#    elif defined(__BORLANDC__) || defined(__IBMC__) || defined(__IBMCPP__) || defined(__SUNPRO_CC)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_BCC())
+#    elif defined(_MSC_VER)
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_MSVC())
+#    else
+#        define BOOST_PP_CONFIG_FLAGS() (BOOST_PP_CONFIG_STRICT())
+#    endif
+# endif
+#
+# /* BOOST_PP_CONFIG_EXTENDED_LINE_INFO */
+#
+# ifndef BOOST_PP_CONFIG_EXTENDED_LINE_INFO
+#    define BOOST_PP_CONFIG_EXTENDED_LINE_INFO 0
+# endif
+#
+# /* BOOST_PP_CONFIG_ERRORS */
+#
+# ifndef BOOST_PP_CONFIG_ERRORS
+#    ifdef NDEBUG
+#        define BOOST_PP_CONFIG_ERRORS 0
+#    else
+#        define BOOST_PP_CONFIG_ERRORS 1
+#    endif
+# endif
+#
+# endif