[Sheriff] Mark test as flaky.

[Sheriff] Mark test as flaky.

BUG=v8:4279
LOG=n
NOTRY=true
TBR=jarin@chromium.org

Committed: https://crrev.com/6d12699ab443048cf6a0f84726ea4072f55eb6b5
Cr-Commit-Position: refs/heads/master@{#29560}

[Michael Achenbach, 2015-07-10 08:22:06]

machenbach@chromium.org changed reviewers:
+ binji@chromium.org, jarin@chromium.org

[Michael Achenbach, 2015-07-10 08:23:13]

FYI: Fails sometimes in isolates, debug mode:
http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug%20-%20i...

Test: mjsunit/regress/regress-4279 (flaky in a repeated run)
Flags: --stress-opt --always-opt
Command: out/Debug/d8 --test --random-seed=-1841652809 --stress-opt --always-opt
--nohard-abort --nodead-code-elimination --nofold-constants
--enable-slow-asserts --debug-code --verify-heap test/mjsunit/mjsunit.js
test/mjsunit/regress/regress-4279.js --isolate test/mjsunit/mjsunit.js
test/mjsunit/regress/regress-4279.js

Run #1
Exit code: -6
Result: FAIL
Expected outcomes: PASS
Duration: 00:00:085

Stdout:
============ Stress 1/2 ============

Stderr:


#
# Fatal error in ../src/base/platform/mutex.cc, line 51
# Check failed: 0 == result (0 vs. 16).
#

==== C stack trace ===============================

 1: 0xf757d400
 2: 0x4

[Michael Achenbach, 2015-07-10 08:30:59]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-07-10 08:31:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1233603002/1

[commit-bot: I haz the power, 2015-07-10 08:32:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-10 08:33:09]

Patchset 1 (id:??) landed as
https://crrev.com/6d12699ab443048cf6a0f84726ea4072f55eb6b5
Cr-Commit-Position: refs/heads/master@{#29560}