Fix the console message when reserved bits exist

https://codereview.chromium.org/177403002/ added checking for reserved
bits in net::WebSocketChannel, but the console message it output was
different from the old implementation. Since the old console message was
more informative, use that instead.

This mostly fixes layout test reserved-bits.html.

BUG=346211
TEST=net_unittests, reserved-bits.html

Review URL: https://codereview.chromium.org/177843015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254161 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254161