Extend destructor checks to account for eagerly finalized class types.

Classes annotated as being eagerly finalized are allowed to touch other
heap objects in their destructors, provided these are not also eagerly
finalized. Extend the CheckFinalizerVisitor implementation to take that
into account

R=haraken
BUG=491488

Review URL: https://codereview.chromium.org/1158623002

Cr-Commit-Position: refs/heads/master@{#331331}
8 files changed