Use new ASAN APIs for scanning ASAN fake stacks during garbage collection.

BUG=339813
NOTRY=true

Review URL: https://codereview.chromium.org/141713008

git-svn-id: svn://svn.chromium.org/blink/trunk@170856 bbb929c8-8fbe-4397-9dbb-9b2b20218538