CrossThreadPersistent invalidation: add missing orphaned check.

The main thread may well be detached before other Oilpan-attached threads.
Its orphaned heap pages must consequently be checked for when doing later
invalidation of thread-local CrossThreadPersistent<>s.

R=haraken
BUG=517031

Review URL: https://codereview.chromium.org/1271243003

git-svn-id: svn://svn.chromium.org/blink/trunk@200046 bbb929c8-8fbe-4397-9dbb-9b2b20218538
2 files changed
tree: f38200a076ab943ff1777e08e35c386bc81e007d
  1. third_party/