Put experimental extras through the same filters as non-experimental

Put experimental extras through the same filters as non-experimental

When introducing experimental extras I forgot to update this check. That resulted in experimental extras running through the steps normally reserved for non-extra natives: macro and constant expansion, validation, and minification. This causes problems since per the linked bug minification is buggy.

R=yangguo@chromium.org, jochen@chromium.org
BUG=v8:4064
LOG=N

Committed: https://crrev.com/0db3710421f0ed187ab97ecb29f1121a4c9278c9
Cr-Commit-Position: refs/heads/master@{#31270}

[domenic, 2015-10-13 20:56:57]

One-line change

This is how I feel about this patch: http://i.imgur.com/MyN2XKd.gif

[Yang, 2015-10-14 11:10:46]

On 2015/10/13 20:56:57, domenic wrote:
> One-line change
> 
> This is how I feel about this patch: http://i.imgur.com/MyN2XKd.gif

lgtm! nice gif :)

[domenic, 2015-10-14 15:51:40]

The CQ bit was checked by domenic@chromium.org

[commit-bot: I haz the power, 2015-10-14 15:51:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1400253002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1400253002/1

[commit-bot: I haz the power, 2015-10-14 17:38:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-14 17:38:53]

Patchset 1 (id:??) landed as
https://crrev.com/0db3710421f0ed187ab97ecb29f1121a4c9278c9
Cr-Commit-Position: refs/heads/master@{#31270}