Merge revision 7629 and 8402 to the 3.2 branch.

This fixes an issue with the optimized version of Math.abs on 64 bit.
Review URL: http://codereview.chromium.org/7236028

git-svn-id: http://v8.googlecode.com/svn/branches/3.2@8403 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
3 files changed