WebSocket: Remove WebSocketChannel::Create() for cleanup

This is a follow-up CL for
https://chromium-review.googlesource.com/c/chromium/src/+/1146134

Bug: 825740
Change-Id: I401fb219d074546fcc13a49f50aab4a37e485010
Reviewed-on: https://chromium-review.googlesource.com/1147880
Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577434}
5 files changed