[WebSocket] Implement "fail channel", renderer side.

Fail, not just close, the NewWebSocketChannel when it is required to
do so by the browser process via NotifyFailure IPC.

BUG=310405
R=tyoshino

Review URL: https://codereview.chromium.org/69993002

git-svn-id: svn://svn.chromium.org/blink/trunk@161854 bbb929c8-8fbe-4397-9dbb-9b2b20218538