Add tests to capture traces of StartupTest.ProfilingScript1 with

Add tests to capture traces of StartupTest.ProfilingScript1 with
and without force-compositing-mode.

Once I retrieve the traces from the bots, I'll revert this change.

BUG=178497
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=188327

[ccameron, 2013-03-15 01:09:12]

I'll be using these new tests to harvest some data from the bots (and then I'll
revert this change).

[Zhenyao Mo, 2013-03-15 02:51:47]

LGTM since this is temporary

https://codereview.chromium.org/12859006/diff/2001/chrome/test/perf/startup_t...
File chrome/test/perf/startup_test.cc (right):

https://codereview.chromium.org/12859006/diff/2001/chrome/test/perf/startup_t...
chrome/test/perf/startup_test.cc:89: sleep(1);
are you sure you want 1 ms?  (sleep is ms instead of sec, right?)

[ccameron, 2013-03-15 07:56:21]

Thanks!!

https://codereview.chromium.org/12859006/diff/2001/chrome/test/perf/startup_t...
File chrome/test/perf/startup_test.cc (right):

https://codereview.chromium.org/12859006/diff/2001/chrome/test/perf/startup_t...
chrome/test/perf/startup_test.cc:89: sleep(1);
On 2013/03/15 02:51:47, Zhenyao Mo wrote:
> are you sure you want 1 ms?  (sleep is ms instead of sec, right?)

This one behaves as seconds (I tested it)
http://linux.die.net/man/3/sleep
But, that said, it's a platform-specific call, so I didn't want to allow it
outside of Mac.

[commit-bot: I haz the power, 2013-03-15 07:58:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/12859006/2001

[commit-bot: I haz the power, 2013-03-15 10:46:14]

Change committed as 188327