Work around --profiler=perf failure with recent linux perf.

Work around --profiler=perf failure with recent linux perf.

Looks like perf --call-graph now requires an argument
in the most recent perf binary.  That's probably a bug
in perf, but moving back to -g for now.

I tried running the telemetry tests, but gave up
after several minutes of gorilla videos stealing focus from my browser.

I found
src/tools/telemetry/telemetry/core/platform/profiler/perf_profiler_unittest.py
but it didn't seem to attempt to test this code
(or have a recommended way for instantiating this kind of
PerfProfiler so I could call this instance method) so I
gave up on testing.

BUG=366928
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266272

[dtu, 2014-04-25 02:01:21]

lgtm

[eseidel, 2014-04-25 02:14:56]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-04-25 02:15:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eseidel@chromium.org/257463007/1

[commit-bot: I haz the power, 2014-04-25 02:21:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-25 02:21:42]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_rel

[eseidel, 2014-04-25 03:05:14]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-04-25 03:05:24]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eseidel@chromium.org/257463007/1

[commit-bot: I haz the power, 2014-04-25 23:02:53]

Change committed as 266272