Merge r10457 into the 3.7 branch.

This fixes a problem on MIPS when directly patching caller's code without issuing write barrier which violated incremental marking invariants.
Review URL: https://chromiumcodereview.appspot.com/9117023

git-svn-id: http://v8.googlecode.com/svn/branches/3.7@10482 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
5 files changed