Remove hidden prototype for builtin functions.

Remove hidden prototype for builtin functions.

This is a deliberate non-conformity introduced more than 2 years ago to
be compatible with JSC. The current state is that all other browsers
perform ES5 conform in that regard.

R=erik.corry@gmail.com
BUG=chromium:1717, chromium:39662
TEST=test262/15.2.3.6-4-6??,mjsunit/undeletable-functions

Committed: http://code.google.com/p/v8/source/detail?r=9993

[Michael Starzinger, 2011-11-14 17:40:15]

PTAL.

[Erik Corry, 2011-11-14 20:18:40]

LGTM :-)

[Lasse Reichstein, 2011-11-18 21:41:57]

Please check whether this also fixed issue 1623.

[Michael Starzinger, 2011-11-21 08:41:15]

Indeed it does, updated issue accordingly.