Add gmock into our dependencies.

third_party/boost/boost/mpl/lambda.hpp

Index: third_party/boost/boost/mpl/lambda.hpp
diff --git a/third_party/boost/boost/mpl/lambda.hpp b/third_party/boost/boost/mpl/lambda.hpp
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+
+#ifndef BOOST_MPL_LAMBDA_HPP_INCLUDED
+#define BOOST_MPL_LAMBDA_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2001-2004
+//
+// 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: 2004-09-02 11:41:37 -0400 (Thu, 02 Sep 2004) $
+// $Revision: 24874 $
+
+#include <boost/mpl/lambda_fwd.hpp>
+#include <boost/mpl/bind.hpp>
+#include <boost/mpl/aux_/config/lambda.hpp>
+
+#if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
+#   include <boost/mpl/aux_/full_lambda.hpp>
+#else
+#   include <boost/mpl/aux_/lambda_no_ctps.hpp>
+#   include <boost/mpl/aux_/lambda_support.hpp>
+#   define BOOST_MPL_CFG_NO_IMPLICIT_METAFUNCTIONS
+#endif
+
+#endif // BOOST_MPL_LAMBDA_HPP_INCLUDED