Add gmock into our dependencies.

third_party/boost/boost/type_traits/remove_reference.hpp

Index: third_party/boost/boost/type_traits/remove_reference.hpp
diff --git a/third_party/boost/boost/type_traits/remove_reference.hpp b/third_party/boost/boost/type_traits/remove_reference.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..3d0b7075ef1de81c0ec79be01c0f0819aa2b5c06
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+++ b/third_party/boost/boost/type_traits/remove_reference.hpp
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+
+//  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 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_REMOVE_REFERENCE_HPP_INCLUDED
+#define BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED
+
+#include <boost/type_traits/broken_compiler_spec.hpp>
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+
+#if BOOST_WORKAROUND(BOOST_MSVC,<=1300)
+#include <boost/type_traits/msvc/remove_reference.hpp>
+#endif
+
+// should be the last #include
+#include <boost/type_traits/detail/type_trait_def.hpp>
+
+namespace boost {
+
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+BOOST_TT_AUX_TYPE_TRAIT_DEF1(remove_reference,T,T)
+BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,remove_reference,T&,T)
+
+#if defined(__BORLANDC__) && (__BORLANDC__ < 0x600)
+// these are illegal specialisations; cv-qualifies applied to
+// references have no effect according to [8.3.2p1],
+// C++ Builder requires them though as it treats cv-qualified
+// references as distinct types...
+BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,remove_reference,T& const,T)
+BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,remove_reference,T& volatile,T)
+BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,remove_reference,T& const volatile,T)
+#endif
+
+#elif !BOOST_WORKAROUND(BOOST_MSVC,<=1300)
+
+BOOST_TT_AUX_TYPE_TRAIT_DEF1(remove_reference,T,typename boost::detail::remove_reference_impl<T>::type)
+
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+} // namespace boost
+
+#include <boost/type_traits/detail/type_trait_undef.hpp>
+
+#endif // BOOST_TT_REMOVE_REFERENCE_HPP_INCLUDED