Move list of hidden record types into TimelineUIUtils

Drive-by: changed type enum used in TracingTimelineModel.js to the one describing tracing events.

BUG=361045
R=loislo@chromium.org

Review URL: https://codereview.chromium.org/348003002

git-svn-id: svn://svn.chromium.org/blink/trunk@176598 bbb929c8-8fbe-4397-9dbb-9b2b20218538