DevTools: fix evaluation on the last async call stack in chain
Evaluation on the oldest async call stack in the chain now works fine.
Drive-by: all async call stacks are now printed in the async call stack tests (before this patch we would stop once testFunction is found in one of the stacks).
BUG=
537021
Committed:
https://crrev.com/a0c3f1c6249deadad09cd9cf0d7a6ad0646fbf08
Cr-Commit-Position: refs/heads/master@{#351399}