GitLab

If the reporter in the stage of beginImpl is replaced with a new
reporter, that means that Impl frame has caused no damage, and should
not be reported as MissedFrame.

Bug: chromium:1030304
Change-Id: I248a4dabf848e2ef6fc752c9388f60a6118092d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1951651
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721874}