Add gmock into our dependencies.

third_party/boost/boost/fusion/tuple/detail/tuple_forward_ctor.hpp

Index: third_party/boost/boost/fusion/tuple/detail/tuple_forward_ctor.hpp
diff --git a/third_party/boost/boost/fusion/tuple/detail/tuple_forward_ctor.hpp b/third_party/boost/boost/fusion/tuple/detail/tuple_forward_ctor.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..2ff20a2ae82e41cc5b0cbaac48b05c16902fdf3d
--- /dev/null
+++ b/third_party/boost/boost/fusion/tuple/detail/tuple_forward_ctor.hpp
@@ -0,0 +1,39 @@
+/*=============================================================================
+    Copyright (c) 2001-2006 Joel de Guzman
+
+    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)
+==============================================================================*/
+#ifndef BOOST_PP_IS_ITERATING
+#if !defined(FUSION_TUPLE_FORWARD_CTOR_10032005_0815)
+#define FUSION_TUPLE_FORWARD_CTOR_10032005_0815
+
+#include <boost/preprocessor/iterate.hpp>
+#include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/repetition/enum_binary_params.hpp>
+
+#define BOOST_PP_FILENAME_1 \
+    <boost/fusion/tuple/detail/tuple_forward_ctor.hpp>
+#define BOOST_PP_ITERATION_LIMITS (1, FUSION_MAX_VECTOR_SIZE)
+#include BOOST_PP_ITERATE()
+
+#endif
+#else // defined(BOOST_PP_IS_ITERATING)
+///////////////////////////////////////////////////////////////////////////////
+//
+//  Preprocessor vertical repetition code
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#define N BOOST_PP_ITERATION()
+
+#if N == 1
+    explicit
+#endif
+    tuple(BOOST_PP_ENUM_BINARY_PARAMS(
+        N, typename detail::call_param<T, >::type _))
+        : base_type(BOOST_PP_ENUM_PARAMS(N, _)) {}
+
+#undef N
+#endif // defined(BOOST_PP_IS_ITERATING)
+