Fix {get,set}ter-on-elements tests to run through all creation functions

Fix {get,set}ter-on-elements tests to run through all creation functions

setter-on-elements had the wrong length hardcoded in a for loop over the
creation functions (getter-on-elements had the right length, but seemed
worth future-proofing).

R=mvstanton@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=24813

[adamk, 2014-10-21 18:52:39]

adamk@chromium.org changed reviewers:
+ mvstanton@chromium.org

[adamk, 2014-10-21 18:52:40]

Found these while poking at the prototype performance bug.

[mvstanton, 2014-10-22 08:15:16]

right on, LGTM.

[adamk, 2014-10-22 17:21:58]

Committed patchset #1 (id:1) manually as 24813 (presubmit successful).