Add gmock into our dependencies.

third_party/boost/boost/mpl/aux_/config/adl.hpp

Index: third_party/boost/boost/mpl/aux_/config/adl.hpp
diff --git a/third_party/boost/boost/mpl/aux_/config/adl.hpp b/third_party/boost/boost/mpl/aux_/config/adl.hpp
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+++ b/third_party/boost/boost/mpl/aux_/config/adl.hpp
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+
+#ifndef BOOST_MPL_AUX_CONFIG_ADL_HPP_INCLUDED
+#define BOOST_MPL_AUX_CONFIG_ADL_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2002-2004
+//
+// 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: 2004-09-16 10:09:12 -0400 (Thu, 16 Sep 2004) $
+// $Revision: 25148 $
+
+#include <boost/mpl/aux_/config/msvc.hpp>
+#include <boost/mpl/aux_/config/intel.hpp>
+#include <boost/mpl/aux_/config/gcc.hpp>
+#include <boost/mpl/aux_/config/workaround.hpp>
+
+// agurt, 25/apr/04: technically, the ADL workaround is only needed for GCC,
+// but putting everything expect public, user-specializable metafunctions into
+// a separate global namespace has a nice side effect of reducing the length 
+// of template instantiation symbols, so we apply the workaround on all 
+// platforms that can handle it
+
+#if !defined(BOOST_MPL_CFG_NO_ADL_BARRIER_NAMESPACE) \
+    && (   BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
+        || BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
+        || BOOST_WORKAROUND(__DMC__, BOOST_TESTED_AT(0x840)) \
+        || BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3202)) \
+        || BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION, BOOST_TESTED_AT(810)) \
+        )
+
+#   define BOOST_MPL_CFG_NO_ADL_BARRIER_NAMESPACE
+
+#endif
+
+#endif // BOOST_MPL_AUX_CONFIG_ADL_HPP_INCLUDED