Oilpan: Add #if ENABLE(ASSERT) to BaseHeapPage::contains() and HeapObjectHeader::zapMagic()
Oilpan: Add #if ENABLE(ASSERT) to BaseHeapPage::contains() and HeapObjectHeader::zapMagic()

They are used in Debug build only.

BUG=446386

Review URL: https://codereview.chromium.org/810653006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@187896 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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