Ensure Array.prototype.indexOf returns +0 rather than -0

Ensure Array.prototype.indexOf returns +0 rather than -0

A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.

R=adamk
LOG=Y

Committed: https://crrev.com/8798ef2d1c254c2d1898a6dd56bf98ddfd60cce5
Cr-Commit-Position: refs/heads/master@{#34229}

[Dan Ehrenberg, 2016-02-23 21:19:02]

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

[commit-bot: I haz the power, 2016-02-23 21:19:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1729653002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1729653002/1

[commit-bot: I haz the power, 2016-02-23 21:31:19]

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

[commit-bot: I haz the power, 2016-02-23 21:31:20]

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/15890)

[Dan Ehrenberg, 2016-02-23 23:00:08]

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

[commit-bot: I haz the power, 2016-02-23 23:00:15]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1729653002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1729653002/20001

[Dan Ehrenberg, 2016-02-23 23:00:35]

Description was changed from

==========
Ensure Array.prototype.indexOf returns +0 rather than -0

A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch causes a new incoming test262 test from the next
roll to pass.

R=adamk
LOG=Y
==========

to

==========
Ensure Array.prototype.indexOf returns +0 rather than -0

A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.

R=adamk
LOG=Y
==========

[commit-bot: I haz the power, 2016-02-23 23:21:28]

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

[commit-bot: I haz the power, 2016-02-23 23:21:29]

Dry run: This issue passed the CQ dry run.

[adamk, 2016-02-23 23:28:59]

lgtm

[Dan Ehrenberg, 2016-02-23 23:30:44]

The CQ bit was checked by littledan@chromium.org

[commit-bot: I haz the power, 2016-02-23 23:30:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1729653002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1729653002/20001

[commit-bot: I haz the power, 2016-02-23 23:33:05]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-02-23 23:33:33]

Description was changed from

==========
Ensure Array.prototype.indexOf returns +0 rather than -0

A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.

R=adamk
LOG=Y
==========

to

==========
Ensure Array.prototype.indexOf returns +0 rather than -0

A recent ES2016 draft spec clarification indicates that, if -0 is
passed into Array.prototype.indexOf or Array.prototype.lastIndexOf
as the starting index, and the result is found at index 0, then +0
rather than -0 should be returned. This patch ensures that V8 has
that result, which is consistent with what some other browsers
return. The patch allows a couple test262 tests to pass.

R=adamk
LOG=Y

Committed: https://crrev.com/8798ef2d1c254c2d1898a6dd56bf98ddfd60cce5
Cr-Commit-Position: refs/heads/master@{#34229}
==========

[commit-bot: I haz the power, 2016-02-23 23:33:34]

Patchset 2 (id:??) landed as
https://crrev.com/8798ef2d1c254c2d1898a6dd56bf98ddfd60cce5
Cr-Commit-Position: refs/heads/master@{#34229}