Fix safepoint entering when waiting for a debugger task.
When attempting to run worker debugger tasks, a timed wait is made on
the underlying task queue. While doing so, we are at a safepoint wrt
Blink GCs for the worker, and enter a safepoint scope.
The worker thread's stack will not be empty and clear of potential heap
references at that point; enter the safepoint with an appropriate
stack state.
R=
BUG=582710
Review URL: https://codereview.chromium.org/1656533002
Cr-Commit-Position: refs/heads/master@{#372570}
1 file changed
