Revert of DevTools: add initial support for console.time/timeEnd in tracing based Timeline (patchset #3 of https://codereview.chromium.org/464063008/)

Reason for revert:
As per comment from nduca. I also don't understand why instrumentation is not reused.

Original issue's description:
> DevTools: add initial support for console.time/timeEnd in tracing based Timeline
> 
> console.time/timeEnd will result in instant trace events. The events will be shown as marker events, i.e. as markers on the Timeline overview.
> 
> BUG=361045
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180635

TBR=nduca@chromium.org,alph@chromium.org,loislo@chromium.org,yurys@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=361045

Review URL: https://codereview.chromium.org/485893006

git-svn-id: svn://svn.chromium.org/blink/trunk@180640 bbb929c8-8fbe-4397-9dbb-9b2b20218538