Add gmock into our dependencies.

third_party/boost/boost/type_traits/is_base_of.hpp

Index: third_party/boost/boost/type_traits/is_base_of.hpp
diff --git a/third_party/boost/boost/type_traits/is_base_of.hpp b/third_party/boost/boost/type_traits/is_base_of.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..bf46da38e38cc4fb4d61338980e6d08ae6475194
--- /dev/null
+++ b/third_party/boost/boost/type_traits/is_base_of.hpp
@@ -0,0 +1,40 @@
+
+//  (C) Copyright Rani Sharoni 2003-2005.
+//  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_IS_BASE_OF_HPP_INCLUDED
+#define BOOST_TT_IS_BASE_OF_HPP_INCLUDED
+
+#include <boost/type_traits/is_base_and_derived.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/type_traits/detail/ice_or.hpp>
+
+// should be the last #include
+#include <boost/type_traits/detail/bool_trait_def.hpp>
+
+namespace boost {
+
+BOOST_TT_AUX_BOOL_TRAIT_DEF2(
+      is_base_of
+    , Base
+    , Derived
+    , (::boost::type_traits::ice_or<      
+         (::boost::detail::is_base_and_derived_impl<Base,Derived>::value),
+         (::boost::is_same<Base,Derived>::value)>::value)
+    )
+
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived,false)
+BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base,Derived&,false)
+BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived&,false)
+#endif
+
+} // namespace boost
+
+#include <boost/type_traits/detail/bool_trait_undef.hpp>
+
+#endif // BOOST_TT_IS_BASE_AND_DERIVED_HPP_INCLUDED