Merged r17599 into 3.21 branch.

Do not add values to HGraph in Lithium.

BUG=298269
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/82553010

git-svn-id: https://v8.googlecode.com/svn/branches/3.21@18019 ce2b1a6d-e550-0410-aec6-3dcde31c8c00