User MessageLoopForIO::WatchFileDescriptor in proces_output_watcher

chromeos/process_proxy/process_proxy_unittest.cc

Index: chromeos/process_proxy/process_proxy_unittest.cc
diff --git a/chromeos/process_proxy/process_proxy_unittest.cc b/chromeos/process_proxy/process_proxy_unittest.cc
index 20221c2918686c5c51596bf74f428f583259ee32..b7b7c7f5ffd440cac5dcbc4e573663b1cac0ada2 100644
--- a/chromeos/process_proxy/process_proxy_unittest.cc
+++ b/chromeos/process_proxy/process_proxy_unittest.cc
@@ -208,6 +208,8 @@ class ProcessProxyTest : public testing::Test {
       process.Terminate(0, true);
     }
 
+    registry_->ShutDown();
+
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::MessageLoop::QuitClosure());
   }