Re-land Clusterfuzz identified overflow check needed in dehoisting.

Overflow check needs to be smarter.

BUG=380092
R=danno@google.com, danno@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/317963004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21712 ce2b1a6d-e550-0410-aec6-3dcde31c8c00