Ensure class prototype objects have the right Map::constructor field

Ensure class prototype objects have the right Map::constructor field

The null constructor they had previously could be observed as crashes in
the V8 API's Object::CreationContext() method and in Object.observe.

BUG=v8:3750
LOG=n
R=arv@chromium.org, dslomov@chromium.org

Committed: https://chromium.googlesource.com/v8/v8/+/986e7cefe13cbfe84649768c26295fed307ae97c

[adamk, 2014-12-09 23:03:52]

adamk@chromium.org changed reviewers:
+ arv@chromium.org, dslomov@chromium.org

[Dmitry Lomov (no reviews), 2014-12-09 23:05:07]

lgtm

[arv (Not doing code reviews), 2014-12-09 23:27:51]

LGTM

[Dmitry Lomov (no reviews), 2014-12-10 16:24:52]

The CQ bit was checked by dslomov@chromium.org

[commit-bot: I haz the power, 2014-12-10 16:25:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/787763005/1

[commit-bot: I haz the power, 2014-12-10 16:26:47]

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

[commit-bot: I haz the power, 2014-12-10 16:26:47]

Try jobs failed on following builders:
  v8_linux64_asan_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel/builds/393)
  v8_linux_arm_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/419)
  v8_win64_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_win64_rel/builds/858)

[adamk, 2014-12-10 18:20:36]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2014-12-10 18:21:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/787763005/1

[commit-bot: I haz the power, 2014-12-10 18:22:17]

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

[commit-bot: I haz the power, 2014-12-10 18:22:18]

Try jobs failed on following builders:
  v8_android_arm_compile_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_android_arm_compile_rel/...)
  v8_linux64_asan_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel/builds/397)
  v8_linux_arm_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/423)

[adamk, 2014-12-10 18:26:00]

Committed patchset #1 (id:1) manually as
986e7cefe13cbfe84649768c26295fed307ae97c (presubmit successful).