Add gmock into our dependencies.

third_party/boost/boost/fusion/sequence/comparison/equal_to.hpp

Index: third_party/boost/boost/fusion/sequence/comparison/equal_to.hpp
diff --git a/third_party/boost/boost/fusion/sequence/comparison/equal_to.hpp b/third_party/boost/boost/fusion/sequence/comparison/equal_to.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..fb27f15c9894dd31cdcb17f1738fbf7b6b063d5c
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+++ b/third_party/boost/boost/fusion/sequence/comparison/equal_to.hpp
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+/*=============================================================================
+    Copyright (c) 1999-2003 Jaakko Jarvi
+    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)
+==============================================================================*/
+#if !defined(FUSION_EQUAL_TO_05052005_0431)
+#define FUSION_EQUAL_TO_05052005_0431
+
+#include <boost/fusion/sequence/intrinsic/begin.hpp>
+#include <boost/fusion/sequence/intrinsic/end.hpp>
+#include <boost/fusion/sequence/intrinsic/size.hpp>
+#include <boost/fusion/sequence/comparison/detail/equal_to.hpp>
+#include <boost/fusion/sequence/comparison/detail/enable_comparison.hpp>
+
+namespace boost { namespace fusion
+{
+    template <typename Seq1, typename Seq2>
+    inline bool
+    equal_to(Seq1 const& a, Seq2 const& b)
+    {
+        return result_of::size<Seq1>::value == result_of::size<Seq2>::value
+            && detail::sequence_equal_to<
+            Seq1 const, Seq2 const
+            , result_of::size<Seq1>::value == result_of::size<Seq2>::value>::
+            call(fusion::begin(a), fusion::begin(b));
+    }
+
+    namespace operators
+    {
+        template <typename Seq1, typename Seq2>
+        inline typename
+            enable_if<
+                detail::enable_equality<Seq1, Seq2>
+              , bool
+            >::type
+        operator==(Seq1 const& a, Seq2 const& b)
+        {
+            return fusion::equal_to(a, b);
+        }
+    }
+    using operators::operator==;
+}}
+
+#endif