Handle captured objects in OptimizedFrame::Summarize.

R=yangguo@chromium.org
BUG=v8:3029
TEST=mjsunit/regress/regress-3029
LOG=N

Review URL: https://codereview.chromium.org/96773002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18187 ce2b1a6d-e550-0410-aec6-3dcde31c8c00