Remove RegExp.prototype.source getter compat workaround

Remove RegExp.prototype.source getter compat workaround

The getter RegExp.prototype.source is specified in ES2015 to throw when
called on a non-RegExp instance, such as RegExp.prototype. We had previously
put in a compatibility workaround for all RegExp getters to make them
throw on access specifically with RegExp.prototype as the receiver; however,
we only have evidence that this is needed for properties other than source.
This patch removes the compatibility workaround for get RegExp.prototype.source
and gives it semantics precisely as per the ES2015 specification.

R=adamk
BUG=chromium:581577, v8:4827
LOG=Y

Committed: https://crrev.com/80803aa89e31839b8f73959776fa7e1923c6b461
Cr-Commit-Position: refs/heads/master@{#35086}

[Dan Ehrenberg, 2016-03-28 19:22:19]

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

[commit-bot: I haz the power, 2016-03-28 19:22:27]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1837843002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1837843002/20001

[commit-bot: I haz the power, 2016-03-28 19:41:58]

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

[commit-bot: I haz the power, 2016-03-28 19:41:59]

Dry run: This issue passed the CQ dry run.

[adamk, 2016-03-28 20:38:08]

lgtm

[Dan Ehrenberg, 2016-03-28 20:38:32]

The CQ bit was checked by littledan@chromium.org

[commit-bot: I haz the power, 2016-03-28 20:38:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1837843002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1837843002/20001

[commit-bot: I haz the power, 2016-03-28 20:42:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-03-28 20:43:08]

Description was changed from

==========
Remove RegExp.prototype.source getter compat workaround

The getter RegExp.prototype.source is specified in ES2015 to throw when
called on a non-RegExp instance, such as RegExp.prototype. We had previously
put in a compatibility workaround for all RegExp getters to make them
throw on access specifically with RegExp.prototype as the receiver; however,
we only have evidence that this is needed for properties other than source.
This patch removes the compatibility workaround for get RegExp.prototype.source
and gives it semantics precisely as per the ES2015 specification.

R=adamk
BUG=chromium:581577,v8:4827
LOG=Y
==========

to

==========
Remove RegExp.prototype.source getter compat workaround

The getter RegExp.prototype.source is specified in ES2015 to throw when
called on a non-RegExp instance, such as RegExp.prototype. We had previously
put in a compatibility workaround for all RegExp getters to make them
throw on access specifically with RegExp.prototype as the receiver; however,
we only have evidence that this is needed for properties other than source.
This patch removes the compatibility workaround for get RegExp.prototype.source
and gives it semantics precisely as per the ES2015 specification.

R=adamk
BUG=chromium:581577,v8:4827
LOG=Y

Committed: https://crrev.com/80803aa89e31839b8f73959776fa7e1923c6b461
Cr-Commit-Position: refs/heads/master@{#35086}
==========

[commit-bot: I haz the power, 2016-03-28 20:43:09]

Patchset 2 (id:??) landed as
https://crrev.com/80803aa89e31839b8f73959776fa7e1923c6b461
Cr-Commit-Position: refs/heads/master@{#35086}

[Dan Ehrenberg, 2016-03-31 17:23:53]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1847783003/ by littledan@chromium.org.

The reason for reverting is: TC39 decided that this compatibility fix should be
standardized..