1) Return failure if any of property sets failed;

1) Return failure if any of property sets failed;
2) We cannot assert the declared property will go to the extension in the presence of callbacks and interceptors.

BUG=1119
TEST=test/mjsunit/regress/regress-1119.js

Committed: http://code.google.com/p/v8/source/detail?r=6687

[antonm, 2011-02-08 18:39:01]

Mads,

may you have a look?

I've added three bailout checks, but managed to test only the last one.  I can
hit the path of first check, but cannot make it fail.  And I cannot hit the path
of the second check.  In any event, those bailouts shouldn't hurt (me thinks)

[Mads Ager (chromium), 2011-02-08 18:44:37]

LGTM, thanks!