Suppress a data race on vfptr in ipc/ipc_sync_channel_unittest.cc...

Suppress a data race on vfptr in ipc/ipc_sync_channel_unittest.cc
This race was already suppressed, but the existing suppression doesn't
work if the order of accesses is different. We can prepare a suppression to make TSAN bots silent
but it will be way too wide. I think adding one line of annotation with comment (twice) is better in terms of precision.
BUG=25841
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=30181

[dank, 2009-10-26 20:06:47]

LGTM.  (Do you really need both kinds of suppression for this?)

[Timur Iskhodzhanov, 2009-10-26 20:13:12]

On 2009/10/26 20:06:47, dank wrote:
> LGTM.  (Do you really need both kinds of suppression for this?)
I had a thought about removing the suppression from the .txt file but I think I
should double-check it.
I'd like to make TSAN bot green ASAP (it's flaky now)
http://build.chromium.org/buildbot/waterfall/waterfall?builder=Linux+Tests+(t...

I'll check whether we need the suppression in the .txt file and will remove it
if we don't - but tomorrow.

[Timur Iskhodzhanov, 2009-10-27 11:28:30]

Looks like you're right, the suppression is not needed if the annotation is
present. I'll remove it.
Thanks!