GitLab

This reverts commit fd2cb104.

Reason for revert: causing crash

Original change's description:
> [throughput] Track last frame
> 
> It could happen that after a BeginImpl(Main)Frame is reported, a tracker
> is scheduled to terminate. In this case, any subsequent handling of
> that impl(main)-frame will be lost. In other words, we completely lost
> track of the last frame.
> 
> This CL fixes the impl frame, the fix for main frame comes later because
> this CL is already big.
> 
> Bug: 1055844
> Change-Id: I1cc65e9a5d973ecb67c83105be03f7bc08139dae
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2079134
> Commit-Queue: Xida Chen <xidachen@chromium.org>
> Reviewed-by: Robert Flack <flackr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#752529}

TBR=flackr@chromium.org,xidachen@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1055844
Change-Id: I5c96139dd4eb8bd38d2133a1b9d8d4d69bacff18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2122041Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753621}