Add WebSocketClientSocketHandleAdapter.

Bug: 801564
Change-Id: I41e16956e9179b7dbacea6672702e282434df663
Reviewed-on: https://chromium-review.googlesource.com/906891
Commit-Queue: Bence Béky <bnc@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#535375}
8 files changed