Add gmock into our dependencies.

third_party/boost/boost/mpl/identity.hpp

Index: third_party/boost/boost/mpl/identity.hpp
diff --git a/third_party/boost/boost/mpl/identity.hpp b/third_party/boost/boost/mpl/identity.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..2cdf4e19adf39020f7f9c391f74eccadc9bd8d03
--- /dev/null
+++ b/third_party/boost/boost/mpl/identity.hpp
@@ -0,0 +1,45 @@
+
+#ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED
+#define BOOST_MPL_IDENTITY_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Source$
+// $Date: 2004-09-02 11:41:37 -0400 (Thu, 02 Sep 2004) $
+// $Revision: 24874 $
+
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+
+namespace boost { namespace mpl {
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct identity
+{
+    typedef T type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))
+};
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct make_identity
+{
+    typedef identity<T> type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))
+};
+
+BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)
+BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)
+
+}}
+
+#endif // BOOST_MPL_IDENTITY_HPP_INCLUDED