Ship ES2015 sloppy-mode const semantics

Ship ES2015 sloppy-mode const semantics

This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.

R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Committed: https://crrev.com/95145fa82612dda7cee08e2ffee4b4316cb328e1
Cr-Commit-Position: refs/heads/master@{#33218}

[Dan Ehrenberg, 2016-01-08 22:57:27]

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

[commit-bot: I haz the power, 2016-01-08 22:57:35]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1571873004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1571873004/1

[commit-bot: I haz the power, 2016-01-08 23:11:13]

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

[commit-bot: I haz the power, 2016-01-08 23:11:14]

Dry run: Try jobs failed on following builders:
  v8_mac_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel/builds/13883)

[Dan Ehrenberg, 2016-01-09 03:22:56]

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

[commit-bot: I haz the power, 2016-01-09 03:23:00]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1571873004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1571873004/20001

[commit-bot: I haz the power, 2016-01-09 05:06:20]

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

[commit-bot: I haz the power, 2016-01-09 05:06:21]

Dry run: Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/8...)

[adamk, 2016-01-11 18:59:03]

https://codereview.chromium.org/1571873004/diff/20001/src/flag-definitions.h
File src/flag-definitions.h (left):

https://codereview.chromium.org/1571873004/diff/20001/src/flag-definitions.h#...
src/flag-definitions.h:190: DEFINE_NEG_IMPLICATION(harmony, legacy_const)
I think you want to have DEFINE_NEG_IMPLICATION(harmony_shipping, legacy_const)
here. That'll cause --noharmony-shipping to re-enable legacy const.

[Dan Ehrenberg, 2016-01-11 21:55:29]

https://codereview.chromium.org/1571873004/diff/20001/src/flag-definitions.h
File src/flag-definitions.h (left):

https://codereview.chromium.org/1571873004/diff/20001/src/flag-definitions.h#...
src/flag-definitions.h:190: DEFINE_NEG_IMPLICATION(harmony, legacy_const)
On 2016/01/11 at 18:59:03, adamk wrote:
> I think you want to have DEFINE_NEG_IMPLICATION(harmony_shipping,
legacy_const) here. That'll cause --noharmony-shipping to re-enable legacy
const.

Fixed

[Dan Ehrenberg, 2016-01-11 21:55:35]

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

[commit-bot: I haz the power, 2016-01-11 21:55:47]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1571873004/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1571873004/60001

[Dan Ehrenberg, 2016-01-11 22:03:22]

Patchset #4 (id:60001) has been deleted

[adamk, 2016-01-11 22:06:07]

lgtm

[Dan Ehrenberg, 2016-01-11 22:06:22]

The CQ bit was unchecked by littledan@chromium.org

[Dan Ehrenberg, 2016-01-11 22:06:23]

The CQ bit was checked by littledan@chromium.org

[commit-bot: I haz the power, 2016-01-11 22:06:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1571873004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1571873004/40001

[commit-bot: I haz the power, 2016-01-11 23:09:31]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-01-11 23:10:07]

Description was changed from

==========
Ship ES2015 sloppy-mode const semantics

This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.

R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
==========

to

==========
Ship ES2015 sloppy-mode const semantics

This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.

R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Committed: https://crrev.com/95145fa82612dda7cee08e2ffee4b4316cb328e1
Cr-Commit-Position: refs/heads/master@{#33218}
==========

[commit-bot: I haz the power, 2016-01-11 23:10:09]

Patchset 3 (id:??) landed as
https://crrev.com/95145fa82612dda7cee08e2ffee4b4316cb328e1
Cr-Commit-Position: refs/heads/master@{#33218}