Relax verification of JSFunction result caches.
Relax verification of JSFunction result caches.

As invocation of a functin may trigger GC and hence clear all the caches,
it's hard to ensure previous invariants.

Current invariant is both a key and a value should be the holes or not holes.

Review URL: http://codereview.chromium.org/6309004

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@6338 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh