Fix websocket key generation algorithm.
Fix websocket key generation algorithm.

http://html5.org/tools/web-apps-tracker?from=5054&to=5055 changed the order
to insert random character and space in key.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/1631023

git-svn-id: http://src.chromium.org/svn/trunk/src@45015 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: a7ad0384aebfe02638276eb6ff87db44f8b320b7
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser