[mojo-edk] Invalidate message handle when rewrite fails

mojo/edk/system/node_channel.cc

Index: mojo/edk/system/node_channel.cc
diff --git a/mojo/edk/system/node_channel.cc b/mojo/edk/system/node_channel.cc
index a50e1c6ce2badba471d2885e7ab3457f9a3e1686..1a7426d5eadccb0bfc68e9b685b619f54059bdea 100644
--- a/mojo/edk/system/node_channel.cc
+++ b/mojo/edk/system/node_channel.cc
@@ -187,6 +187,7 @@ void NodeChannel::ShutDown() {
 void NodeChannel::SetRemoteProcessHandle(base::ProcessHandle process_handle) {
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
   base::AutoLock lock(remote_process_handle_lock_);
+  CHECK_NE(remote_process_handle_, base::GetCurrentProcessHandle());
   remote_process_handle_ = process_handle;
 }