Add gmock into our dependencies.

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

Index: third_party/boost/boost/fusion/adapted/struct/detail/category_of_impl.hpp
diff --git a/third_party/boost/boost/fusion/adapted/struct/detail/category_of_impl.hpp b/third_party/boost/boost/fusion/adapted/struct/detail/category_of_impl.hpp
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index 0000000000000000000000000000000000000000..c23b97511c0f1f7aa041aa26221100226ef1a9ea
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+++ b/third_party/boost/boost/fusion/adapted/struct/detail/category_of_impl.hpp
@@ -0,0 +1,35 @@
+/*=============================================================================
+    Copyright (c) 2001-2006 Joel de Guzman
+    Copyright (c) 2005-2006 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_CATEGORY_OF_IMPL_24122005_1731)
+#define BOOST_FUSION_CATEGORY_OF_IMPL_24122005_1731
+
+#include <boost/config/no_tr1/utility.hpp>
+
+namespace boost { namespace fusion
+{
+    struct struct_tag;
+    struct random_access_traversal_tag;
+
+    namespace extension
+    {
+        template<typename T>
+        struct category_of_impl;
+
+        template<>
+        struct category_of_impl<struct_tag>
+        {
+            template<typename T>
+            struct apply
+            {
+                typedef random_access_traversal_tag type;
+            };
+        };
+    }
+}}
+
+#endif