Fix Mojo broker crash on Windows.

mojo/edk/system/message_pipe_dispatcher.cc

Index: mojo/edk/system/message_pipe_dispatcher.cc
diff --git a/mojo/edk/system/message_pipe_dispatcher.cc b/mojo/edk/system/message_pipe_dispatcher.cc
index 119124a424109864b85a280ad2b5c8035aa19f72..11dc586ceec90dfdfcf061466f94d8d75a526107 100644
--- a/mojo/edk/system/message_pipe_dispatcher.cc
+++ b/mojo/edk/system/message_pipe_dispatcher.cc
@@ -986,6 +986,10 @@ void MessagePipeDispatcher::OnError(Error error) {
         // Balance AddRef in CloseOnIO.
         call_release = true;
       }
+    } else if (!channel_ && !transferable_ &&
+               non_transferable_state_ == WAITING_FOR_CONNECT_TO_CLOSE) {
+      // Balance AddRef in CloseOnIO.
+      call_release = true;
     }
     awakable_list_.AwakeForStateChange(GetHandleSignalsStateImplNoLock());
     started_transport_.Release();