Return length passed instead of receiver to allow chained assignments like

Return length passed instead of receiver to allow chained assignments like

foo = a.length = 7

BUG=crbug.com/36854

Committed: http://code.google.com/p/v8/source/detail?r=3979

[antonm, 2010-02-26 13:24:34]

Søren, Mads,

may you have a look?

Actual reduction is the last loop added.  It might be a good idea to wrap the
whole array-length into a loop.

I hope it's fine to return len passed, but to play more safely I could return
receiver->length.  However, for callbacks we already return the value, so I
decided against that approach.

And yes, I opened chrome://extensions in Chromium built vs. bleeding edge ToT :)

[Søren Thygesen Gjesse, 2010-02-26 14:09:42]

LGTM