Version 3.28.43.1 (merged r22638)

Use return value of GetPropertyAttributes to make compiler happy.

TBR=ishell@chromium.org
BUG=

Review URL: https://codereview.chromium.org/421913006

git-svn-id: https://v8.googlecode.com/svn/trunk@22640 ce2b1a6d-e550-0410-aec6-3dcde31c8c00