Put console.time into a separate trace event category.

Put console.time into a separate trace event category.

In rendering benchmarks we want to only capture trace events that are
required for the benchmark. console.time is used frequently, but everything
else from the 'webkit' category is not. Putting console.time into a separate
category 'webkit.console' will reduce overhead and make trace buffer overflows
less likely.

R=jamesr@chromium.org, nduca@chromium.org, tonyg@chromium.org
BUG=264308
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=157377

[tonyg, 2013-09-05 21:05:00]

lgtm

[nduca, 2013-09-05 21:41:39]

awesome lgtm

[commit-bot: I haz the power, 2013-09-06 16:29:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ernstm@chromium.org/23848006/1

[commit-bot: I haz the power, 2013-09-06 17:43:37]

Change committed as 157377