GitLab

The WebSocketStream explainer describes being able to pass an
AbortSignal object to the WebSocketStream constructor to abort the
handshake. This wasn't implemented yet in Blink. Implement it.

Bug: 983030
Change-Id: I9d96bf145a4978867dd8ae98a13af9ad9cff752c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827116Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701971}