[generators] Add asserts preventing mixed functions.

[generators] Add asserts preventing mixed functions.

This adds assertions to generator support functions that distinguish
between old-style and new-style generators which make sure only one
of those styles is actually used. Even though normal functions can soon
be mixed (bytecode and baseline code at the same time), generator
functions are still exclusively in only one tier.

R=neis@chromium.org
BUG=v8:5265
Committed: https://crrev.com/417b3010b2c20b68116113f03793edfa3f204520
Cr-Commit-Position: refs/heads/master@{#38541}

[Michael Starzinger, 2016-08-10 13:39:32]

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

[commit-bot: I haz the power, 2016-08-10 13:39:46]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[neis, 2016-08-10 13:41:07]

lgtm

[commit-bot: I haz the power, 2016-08-10 14:13:01]

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

[commit-bot: I haz the power, 2016-08-10 14:13:02]

Dry run: This issue passed the CQ dry run.

[Michael Starzinger, 2016-08-10 14:17:55]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-08-10 14:18:01]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-10 14:19:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-10 14:19:59]

Description was changed from

==========
[generators] Add asserts preventing mixed functions.

This adds assertions to generator support functions that distinguish
between old-style and new-style generators which make sure only one
of those styles is actually used. Even though normal functions can soon
be mixed (bytecode and baseline code at the same time), generator
functions are still exclusively in only one tier.

R=neis@chromium.org
BUG=v8:5265
==========

to

==========
[generators] Add asserts preventing mixed functions.

This adds assertions to generator support functions that distinguish
between old-style and new-style generators which make sure only one
of those styles is actually used. Even though normal functions can soon
be mixed (bytecode and baseline code at the same time), generator
functions are still exclusively in only one tier.

R=neis@chromium.org
BUG=v8:5265

Committed: https://crrev.com/417b3010b2c20b68116113f03793edfa3f204520
Cr-Commit-Position: refs/heads/master@{#38541}
==========

[commit-bot: I haz the power, 2016-08-10 14:20:00]

Patchset 1 (id:??) landed as
https://crrev.com/417b3010b2c20b68116113f03793edfa3f204520
Cr-Commit-Position: refs/heads/master@{#38541}