Add gmock into our dependencies.

third_party/boost/boost/fusion/adapted/struct/detail/has_key_impl.hpp

Index: third_party/boost/boost/fusion/adapted/struct/detail/has_key_impl.hpp
diff --git a/third_party/boost/boost/fusion/adapted/struct/detail/has_key_impl.hpp b/third_party/boost/boost/fusion/adapted/struct/detail/has_key_impl.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..8972f5df8b4e5b3fc4e262797cf2526688b6f681
--- /dev/null
+++ b/third_party/boost/boost/fusion/adapted/struct/detail/has_key_impl.hpp
@@ -0,0 +1,40 @@
+/*=============================================================================
+    Copyright (c) 2001-2007 Joel de Guzman
+    Copyright (c) 2005-2007 Dan Marsden
+
+    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)
+==============================================================================*/
+#if !defined(BOOST_FUSION_HAS_KEY_IMPL_20070508_2231)
+#define BOOST_FUSION_HAS_KEY_IMPL_20070508_2231
+
+#include <boost/type_traits/is_same.hpp>
+#include <boost/mpl/not.hpp>
+
+namespace boost { namespace fusion {
+
+    struct struct_tag;
+
+    namespace extension
+    {
+        struct no_such_member;
+
+        template<typename T>
+        struct has_key_impl;
+
+        template<typename Struct, typename Key>
+        struct struct_assoc_member;
+
+        template<>
+        struct has_key_impl<struct_tag>
+        {
+            template<typename Sequence, typename Key>
+            struct apply
+                : mpl::not_<is_same<no_such_member, typename struct_assoc_member<Sequence, Key>::type> >
+            {
+            };
+        };
+    }
+}}
+
+#endif