Oilpan: Fix Heap::isConsistentForGC which only checks the heap for one attached thread at this point.
Oilpan: Fix Heap::isConsistentForGC which only checks the heap for one attached thread at this point.

Thanks for noticing this Peter. :)

R=oilpan-reviews@chromium.org, pkasting@chromium.org, zerny@chromium.org
BUG=

Review URL: https://codereview.chromium.org/206113002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@169635 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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