Add QUIC proxy support for HTTPS servers

Bug: 335275
Change-Id: I696e22b5f8912399fcbf56d7e428ceb95c1ff6f4
Reviewed-on: https://chromium-review.googlesource.com/858603
Reviewed-by: Ryan Hamilton <rch@chromium.org>
Commit-Queue: Yixin Wang <wangyix@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531274}
7 files changed