Support creating mojo peer connections from named pipes.

mojo/edk/test/multiprocess_test_helper.h

Index: mojo/edk/test/multiprocess_test_helper.h
diff --git a/mojo/edk/test/multiprocess_test_helper.h b/mojo/edk/test/multiprocess_test_helper.h
index 689b0ecab5bd83ad1901612a6e41dadea137c14b..5226a95352e609c234c75cf52e3391fc2a1eff5a 100644
--- a/mojo/edk/test/multiprocess_test_helper.h
+++ b/mojo/edk/test/multiprocess_test_helper.h
@@ -33,6 +33,14 @@ class MultiprocessTestHelper {
 
     // Launch the child process as an unrelated peer process in the mojo system.
     PEER,
+
+    // Launch the child process as a child in the mojo system, using a named
+    // pipe.
+    NAMED_CHILD,
+
+    // Launch the child process as an unrelated peer process in the mojo
+    // system, using a named pipe.
+    NAMED_PEER,
   };
 
   MultiprocessTestHelper();