Fix accessor map transitions vs. Object.defineProperty

Fix accessor map transitions vs. Object.defineProperty

BUG=v8:4534
LOG=n
R=yangguo@chromium.org

Committed: https://crrev.com/b4d46bc5a0bd6749091532282460534054d34f14
Cr-Commit-Position: refs/heads/master@{#31750}

[Yang, 2015-11-03 13:55:56]

On 2015/11/03 13:20:39, Jakob wrote:

lgtm, but please add a test case that works without gc stress.

[Jakob Kummerow, 2015-11-03 14:04:14]

The CQ bit was checked by jkummerow@chromium.org

[Jakob Kummerow, 2015-11-03 14:04:15]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/1413723011/#ps20001
(title: "add testcase")

[commit-bot: I haz the power, 2015-11-03 14:04:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1413723011/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1413723011/20001

[commit-bot: I haz the power, 2015-11-03 14:41:24]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-11-03 14:42:02]

Patchset 2 (id:??) landed as
https://crrev.com/b4d46bc5a0bd6749091532282460534054d34f14
Cr-Commit-Position: refs/heads/master@{#31750}