[Invalidation Tracking] fix typo in trace event category

'devtools.timeine' -> 'devtools.timeline'

BUG=410701

Review URL: https://codereview.chromium.org/596083004

git-svn-id: svn://svn.chromium.org/blink/trunk@182536 bbb929c8-8fbe-4397-9dbb-9b2b20218538