GitLab

This CL fixes the crash if mojo creation in OnAddChannelResponse failed,
then we call WebSocket::Reset(), which deletes WebSocketChannel but it
tries to call instance methods after that.

To fix that, this CL unifies WebSocket::WebSocketEventHandler
::OnAddChannelResponse and ::AddSendFlowControlQuota for quota
initialize.

Fixed: 1018432
Change-Id: I197a15c07e23b04284713e67fca2dfcd92f01e1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1883450Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710638}