Throw if setting length of a string in strict mode.

Throw if setting length of a string in strict mode.


BUG=
TEST=test/mjsunit/strict-mode.js

Committed: http://code.google.com/p/v8/source/detail?r=7064

[Martin Maly, 2011-03-04 02:38:42]

Upon landing this will/should trigger one of webkit layout test expectations
(there is one expectation of failure for a test which now should pass).

As soon as I confirm on my machine that this is indeed the case I will create
webkit patch to update the test expectations.

Thank you!
Martin

[Lasse Reichstein, 2011-03-04 14:01:53]

LGTM