Explicitly dispose of async call chains.

When resetting V8AsyncCallTracker's call chains, promptly dispose of the
call chain map; Oilpan friendly not to delay it until the dtor is
eventually invoked.

R=yurys
BUG=443585

Review URL: https://codereview.chromium.org/818673004

git-svn-id: svn://svn.chromium.org/blink/trunk@187723 bbb929c8-8fbe-4397-9dbb-9b2b20218538
4 files changed
tree: 1e4af47dfdb7b492ac73f135c8fba27f47249d6e
  1. third_party/