Add gmock into our dependencies.

third_party/boost/boost/fusion/support/detail/as_fusion_element.hpp

Index: third_party/boost/boost/fusion/support/detail/as_fusion_element.hpp
diff --git a/third_party/boost/boost/fusion/support/detail/as_fusion_element.hpp b/third_party/boost/boost/fusion/support/detail/as_fusion_element.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..2d020644ddb3da439cc3f13adb0827e2b1931956
--- /dev/null
+++ b/third_party/boost/boost/fusion/support/detail/as_fusion_element.hpp
@@ -0,0 +1,47 @@
+/*=============================================================================
+    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_AS_FUSION_ELEMENT_05052005_0338)
+#define FUSION_AS_FUSION_ELEMENT_05052005_0338
+
+#include <boost/ref.hpp>
+
+namespace boost { namespace fusion { namespace detail
+{
+    template <typename T>
+    struct as_fusion_element
+    {
+        typedef T type;
+    };
+
+    template <typename T>
+    struct as_fusion_element<reference_wrapper<T> >
+    {
+        typedef T& type;
+    };
+
+    template <typename T, int N>
+    struct as_fusion_element<T[N]>
+    {
+        typedef const T(&type)[N];
+    };
+
+    template <typename T, int N>
+    struct as_fusion_element<volatile T[N]>
+    {
+        typedef const volatile T(&type)[N];
+    };
+
+    template <typename T, int N>
+    struct as_fusion_element<const volatile T[N]>
+    {
+        typedef const volatile T(&type)[N];
+    };
+
+}}}
+
+#endif