GitLab

This CL changes ChannelPosix::WriteNoLock() to send limited number
of handles at a time so that it won't overflow the |cmsg_buf| buffer
that is used at mojo::SendmsgWithHandles().

Bug: 935357
Change-Id: I9df239763d5976022564881b8da81acfa6d61f1c
Reviewed-on: https://chromium-review.googlesource.com/c/1489104
Commit-Queue: Jun Cai <juncai@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#636287}