Move bug 3280 regression test to mjsunit/harmony

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/248483004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20913 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Clean up some uses of Failures and MaybeObjects.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/245963007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20914 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'