Add gmock into our dependencies.

third_party/boost/boost/fusion/container/vector/detail/at_impl.hpp

Index: third_party/boost/boost/fusion/container/vector/detail/at_impl.hpp
diff --git a/third_party/boost/boost/fusion/container/vector/detail/at_impl.hpp b/third_party/boost/boost/fusion/container/vector/detail/at_impl.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..1a00f428cd78dd2151397ab601d54d1b6e3df514
--- /dev/null
+++ b/third_party/boost/boost/fusion/container/vector/detail/at_impl.hpp
@@ -0,0 +1,49 @@
+/*=============================================================================
+    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_AT_IMPL_05042005_0741)
+#define FUSION_AT_IMPL_05042005_0741
+
+#include <boost/fusion/support/detail/access.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/mpl/at.hpp>
+#include <boost/mpl/int.hpp>
+
+namespace boost { namespace fusion
+{
+    struct vector_tag;
+
+    namespace extension
+    {
+        template <typename Tag>
+        struct at_impl;
+
+        template <>
+        struct at_impl<vector_tag>
+        {
+            template <typename Sequence, typename N>
+            struct apply 
+            {
+                typedef mpl::at<typename Sequence::types, N> element;
+                typedef typename
+                    mpl::eval_if<
+                        is_const<Sequence>
+                      , detail::cref_result<element>
+                      , detail::ref_result<element>
+                    >::type
+                type;
+    
+                static type
+                call(Sequence& v)
+                {
+                    return v.at_impl(N());
+                }
+            };
+        };
+    }
+}}
+
+#endif