[heap] Properly reset flags for partially aborted evacuation candidates.

[heap] Properly reset flags for partially aborted evacuation candidates.

See bug description.

R=hpayer@chromium.org
BUG=chromium:538257
LOG=N

Committed: https://crrev.com/5ef26f3a6b2a0efd7458be6f11b34cae876d51f4
Cr-Commit-Position: refs/heads/master@{#31070}

[Michael Lippautz, 2015-10-02 08:56:17]

mlippautz@chromium.org changed reviewers:
+ hpayer@chromium.org

[Michael Lippautz, 2015-10-02 08:56:17]

PTAL

[Hannes Payer (out of office), 2015-10-02 08:59:38]

Add a test case, e.g. the CF repro.

[Hannes Payer (out of office), 2015-10-02 10:58:02]

As discussed offline, a test is tricky to get for this scenario. LGTM

[Michael Lippautz, 2015-10-02 11:19:50]

PTAL. The test case is only working because we have proper DCHECKs in Sweep().

[Michael Lippautz, 2015-10-02 11:20:53]

The CQ bit was checked by mlippautz@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-02 11:21:05]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1381633005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1381633005/20001

[commit-bot: I haz the power, 2015-10-02 11:42:45]

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

[commit-bot: I haz the power, 2015-10-02 11:42:46]

Dry run: This issue passed the CQ dry run.

[Michael Lippautz, 2015-10-02 11:46:06]

As discussed offline: This test is better than no test.

[Michael Lippautz, 2015-10-02 11:47:23]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2015-10-02 11:47:24]

The patchset sent to the CQ was uploaded after l-g-t-m from hpayer@chromium.org
Link to the patchset: https://codereview.chromium.org/1381633005/#ps20001
(title: "Add test case for symptom")

[commit-bot: I haz the power, 2015-10-02 11:47:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1381633005/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1381633005/20001

[commit-bot: I haz the power, 2015-10-02 11:50:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-02 11:50:23]

Patchset 2 (id:??) landed as
https://crrev.com/5ef26f3a6b2a0efd7458be6f11b34cae876d51f4
Cr-Commit-Position: refs/heads/master@{#31070}