Add gmock into our dependencies.

third_party/boost/boost/mpl/next_prior.hpp

Index: third_party/boost/boost/mpl/next_prior.hpp
diff --git a/third_party/boost/boost/mpl/next_prior.hpp b/third_party/boost/boost/mpl/next_prior.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..df5be9d6dc0eacc21084a055fe05b3df9340b3f0
--- /dev/null
+++ b/third_party/boost/boost/mpl/next_prior.hpp
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+
+#ifndef BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
+#define BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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/libs/mpl for documentation.
+
+// $Source$
+// $Date: 2004-09-17 02:09:38 -0400 (Fri, 17 Sep 2004) $
+// $Revision: 25163 $
+
+#include <boost/mpl/aux_/common_name_wknd.hpp>
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+
+namespace boost { namespace mpl {
+
+BOOST_MPL_AUX_COMMON_NAME_WKND(next)
+BOOST_MPL_AUX_COMMON_NAME_WKND(prior)
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct next
+{
+    typedef typename T::next type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T))
+};
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct prior
+{
+    typedef typename T::prior type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T))
+};
+
+BOOST_MPL_AUX_NA_SPEC(1, next)
+BOOST_MPL_AUX_NA_SPEC(1, prior)
+
+}}
+
+#endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED