Reapply http://code.google.com/p/v8/source/detail?r=6555

Reapply http://code.google.com/p/v8/source/detail?r=6555

Compare JSObjects by identity immediately.

When invoking EQUALS JS builtin, 1st argument is passed as a receiver and
if it's a global object, it gets overwritten with global proxy object and
thus one gets incorrect results.

BUG=v8:1082
TBR=ricow@chromium.org

[antonm, 2011-02-09 19:12:16]

TBRing to you, Rico.

[Rico, 2011-02-10 06:45:18]

LGTM