Make message listener API backwards compatible.

R=ulan@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/12217066

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix materialization of arguments objects with unknown values.

This fixes the deoptimizer to materialize arguments objects of correct
length even in cases where the actual argument values are unknown and
were optimized away by Crankshaft. This can happen if only the length
property or the identity of an arguments object is used.

R=svenpanne@chromium.org
BUG=chromium:163530
TEST=mjsunit/regress/regress-crbug-163530

Review URL: https://codereview.chromium.org/12335132

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13763 ce2b1a6d-e550-0410-aec6-3dcde31c8c00