Merged r16994 into trunk branch.

Try to make MSVC happy about EscapableHandleScope.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/25076003

git-svn-id: https://v8.googlecode.com/svn/trunk@16995 ce2b1a6d-e550-0410-aec6-3dcde31c8c00