Port r10981 (5ea074), r10982 (5f0d413) and r10983 (663a897d5).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9668045
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11003 ce2b1a6d-e550-0410-aec6-3dcde31c8c00