GitLab

Split out code from DOMWebSocket that will be shared with
WebSocketStream into a new class, WebSocketCommon.

The major methods that have been moved are Connect() and
CloseInternal(). Connect() in particular has some security-critical
checks that should not be duplicated.

Some members of DOMWebSocket have been moved to WebSocketCommon because
they need to be modified by WebSocketCommon methods. The
most important of these is |status_|.

This is part of the implementation work for WebSocketStream. The design
doc for the work as a whole is at
https://docs.google.com/document/d/1XuxEshh5VYBYm1qRVKordTamCOsR-uGQBCYFcHXP4L0/edit

BUG=983030

Change-Id: Idba0d5181b2a6946f65d10083f9e15a0fe5e7ec9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1731010Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683938}