Apply pyformat to WebSocket layout tests

Applied pyformat to WebSocket layout tests to bring them closer to pep8
compliance.

Command-line used was

pyformat -s4 -r -i --force_quote_type single --ignore 'E501' .

It doesn't seem to be possible to completely prevent pyformat from
wrapping long lines, so some changes were reverted by hand.

BUG=237056
TEST=ran layout tests

Review URL: https://codereview.chromium.org/246293012

git-svn-id: svn://svn.chromium.org/blink/trunk@172470 bbb929c8-8fbe-4397-9dbb-9b2b20218538