Remove RegExp.multiline accessors.

Remove RegExp.multiline accessors.

This is non-standard and not even documented on MDN.

On Firefox, setting RegExp.multiline to true adds the multiline flag to all
newly created RegExp objects (both from constructor and from literal).

In V8 this has no effect.

Source archaelogy shows that this is from the initial commit.

R=bmeurer@chromium.org

Committed: https://crrev.com/e8f752ce0c2a488e88cd87fe75f3907b4303d0a0
Cr-Commit-Position: refs/heads/master@{#31673}

[Benedikt Meurer, 2015-10-30 08:25:24]

lgtm

[Yang, 2015-10-30 08:25:59]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-10-30 08:26:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1410993008/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1410993008/1

[commit-bot: I haz the power, 2015-10-30 08:36:27]

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

[commit-bot: I haz the power, 2015-10-30 08:36:28]

Try jobs failed on following builders:
  v8_linux64_avx2_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel/builds/...)
  v8_mac_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel/builds/11317)

[Yang, 2015-10-30 08:41:34]

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

[commit-bot: I haz the power, 2015-10-30 08:41:41]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1410993008/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1410993008/20001

[commit-bot: I haz the power, 2015-10-30 08:53:46]

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

[commit-bot: I haz the power, 2015-10-30 08:53:47]

Dry run: Try jobs failed on following builders:
  v8_linux_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_rel/builds/11195)

[Yang, 2015-10-30 09:27:01]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2015-10-30 09:27:01]

The patchset sent to the CQ was uploaded after l-g-t-m from bmeurer@chromium.org
Link to the patchset: https://codereview.chromium.org/1410993008/#ps40001
(title: "git cl set_commit")

[commit-bot: I haz the power, 2015-10-30 09:27:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1410993008/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1410993008/40001

[commit-bot: I haz the power, 2015-10-30 09:46:09]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-10-30 09:46:35]

Patchset 3 (id:??) landed as
https://crrev.com/e8f752ce0c2a488e88cd87fe75f3907b4303d0a0
Cr-Commit-Position: refs/heads/master@{#31673}

[Michael Achenbach, 2015-10-30 10:46:41]

A revert of this CL (patchset #3 id:40001) has been created in
https://codereview.chromium.org/1431433004/ by machenbach@chromium.org.

The reason for reverting is: [Sheriff] Causes layout test failures..