Version 3.28.15.1 (merged r22228)

Add missing include to timers

TBR=dslomov@chromium.org
BUG=391721
LOG=N

Review URL: https://codereview.chromium.org/377533002

git-svn-id: https://v8.googlecode.com/svn/trunk@22243 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk