Add gmock into our dependencies.

third_party/boost/boost/type_traits/detail/ice_eq.hpp

Index: third_party/boost/boost/type_traits/detail/ice_eq.hpp
diff --git a/third_party/boost/boost/type_traits/detail/ice_eq.hpp b/third_party/boost/boost/type_traits/detail/ice_eq.hpp
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+++ b/third_party/boost/boost/type_traits/detail/ice_eq.hpp
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+//  (C) Copyright John Maddock and Steve Cleary 2000.
+//  Use, modification and distribution are subject to 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/type_traits for most recent version including documentation.
+
+#ifndef BOOST_TT_DETAIL_ICE_EQ_HPP_INCLUDED
+#define BOOST_TT_DETAIL_ICE_EQ_HPP_INCLUDED
+
+#include <boost/config.hpp>
+
+namespace boost {
+namespace type_traits {
+
+template <int b1, int b2>
+struct ice_eq
+{
+    BOOST_STATIC_CONSTANT(bool, value = (b1 == b2));
+};
+
+template <int b1, int b2>
+struct ice_ne
+{
+    BOOST_STATIC_CONSTANT(bool, value = (b1 != b2));
+};
+
+#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
+template <int b1, int b2> bool const ice_eq<b1,b2>::value;
+template <int b1, int b2> bool const ice_ne<b1,b2>::value;
+#endif
+
+} // namespace type_traits
+} // namespace boost
+
+#endif // BOOST_TT_DETAIL_ICE_EQ_HPP_INCLUDED