Allow custom security descriptors when creating named pipes on Windows.

mojo/edk/test/multiprocess_test_helper.cc

Index: mojo/edk/test/multiprocess_test_helper.cc
diff --git a/mojo/edk/test/multiprocess_test_helper.cc b/mojo/edk/test/multiprocess_test_helper.cc
index d6390cc79b401525c814e14e8d5e93330bf01158..611c465bd387c0865e27714cdce1ed23ef4a8782 100644
--- a/mojo/edk/test/multiprocess_test_helper.cc
+++ b/mojo/edk/test/multiprocess_test_helper.cc
@@ -148,7 +148,7 @@ ScopedMessagePipeHandle MultiprocessTestHelper::StartChildWithExtraSwitch(
   } else if (launch_type == LaunchType::PEER) {
     pipe = ConnectToPeerProcess(channel.PassServerHandle());
   } else if (launch_type == LaunchType::NAMED_PEER) {
-    pipe = ConnectToPeerProcess(CreateServerHandle(named_pipe, false));
+    pipe = ConnectToPeerProcess(CreateServerHandle(named_pipe));
   }
 
   test_child_ =
@@ -160,9 +160,8 @@ ScopedMessagePipeHandle MultiprocessTestHelper::StartChildWithExtraSwitch(
     ChildProcessLaunched(test_child_.Handle(), channel.PassServerHandle(),
                          child_token, process_error_callback_);
   } else if (launch_type == LaunchType::NAMED_CHILD) {
-    ChildProcessLaunched(test_child_.Handle(),
-                         CreateServerHandle(named_pipe, false), child_token,
-                         process_error_callback_);
+    ChildProcessLaunched(test_child_.Handle(), CreateServerHandle(named_pipe),
+                         child_token, process_error_callback_);
   }
 
   CHECK(test_child_.IsValid());