Replace IS_OBJECT with IS_RECEIVER in regexp.js

Replace IS_OBJECT with IS_RECEIVER in regexp.js

"IS_RECEIVER" used to be called "IS_SPEC_OBJECT", which might be a better
name: it's what the spec means when it says "Type(O) is Object".

R=littledan@chromium.org
BUG=v8:4602
LOG=n

Committed: https://crrev.com/fafa7635891d4d04f5003e15fa154b725ca53d0d
Cr-Commit-Position: refs/heads/master@{#35075}

[Dan Ehrenberg, 2016-03-25 21:19:48]

lgtm

[adamk, 2016-03-25 21:35:14]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2016-03-25 21:35:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1838593002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1838593002/1

[commit-bot: I haz the power, 2016-03-25 21:54:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-25 21:55:04]

Description was changed from

==========
Replace IS_OBJECT with IS_RECEIVER in regexp.js

"IS_RECEIVER" used to be called "IS_SPEC_OBJECT", which might be a better
name: it's what the spec means when it says "Type(O) is Object".

R=littledan@chromium.org
BUG=v8:4602
LOG=n
==========

to

==========
Replace IS_OBJECT with IS_RECEIVER in regexp.js

"IS_RECEIVER" used to be called "IS_SPEC_OBJECT", which might be a better
name: it's what the spec means when it says "Type(O) is Object".

R=littledan@chromium.org
BUG=v8:4602
LOG=n

Committed: https://crrev.com/fafa7635891d4d04f5003e15fa154b725ca53d0d
Cr-Commit-Position: refs/heads/master@{#35075}
==========

[commit-bot: I haz the power, 2016-03-25 21:55:04]

Patchset 1 (id:??) landed as
https://crrev.com/fafa7635891d4d04f5003e15fa154b725ca53d0d
Cr-Commit-Position: refs/heads/master@{#35075}