Fix concurrent osr.
InstallOptimizedCode aquires ownership on the compilation info and deletes
it on return, tearing down the attached zone. The OptimizingCompiler
object is a zone object allocated in just that zone, so it also gets
deleted. Effectively, InstallOptimizedCode cleans up when it's done, so
the OptimizingCompiler object it receives is invalidated afterwards.
R=titzer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
23769007
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16609
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00