Fix to get around an assertion that triggers when generating code that happens to be dead because the assertion is checked a bit earlier at runtime.

R=ishell@chromium.org
BUG=355486
LOG=N

Review URL: https://codereview.chromium.org/201573011

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20218 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert the (wrong) fix of the argument index check asserion.

R=ishell@chromium.org
BUG=

Review URL: https://codereview.chromium.org/208423017

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20219 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'