Avoid race at shutdown between browser process' IO thread and GPU thread

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index 90e1e698856c11fe28eb36ee3f3320d3feceac77..8dafe6c190705ee1f3d4048c7d4de1f163f1ee3d 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -619,7 +619,10 @@ void ChildThreadImpl::OnChannelConnected(int32_t peer_pid) {
 
 void ChildThreadImpl::OnChannelError() {
   on_channel_error_called_ = true;
-  base::MessageLoop::current()->QuitWhenIdle();
+  // If this thread runs in the browser process, only Thread::Stop should
+  // stop its message loop. Otherwise, QuitWhenIdle could race Thread::Stop.
+  if (!IsInBrowserProcess())
+    base::MessageLoop::current()->QuitWhenIdle();
 }
 
 bool ChildThreadImpl::Send(IPC::Message* msg) {