Reason for revert: Reland with fixes to the failing perf tests. Original issue's description: > Revert of rewrite frame generator capturer to use TaskQueue instead of EventTimeWrapper (patchset #2 id:90001 of https://codereview.webrtc.org/2744003002/ ) > > Reason for revert: > CallPerfTest.ReceivesCpuOveruseAndUnderuse perf test fails due to this CL. It requires very accurate frame rate, which may not be so accurate now. > > Original issue's description: > > Reland of rewrite frame generator capturer to use TaskQueue instead of EventTimeWrapper (patchset #1 id:1 of https://codereview.webrtc.org/2743993002/ ) > > > > And enable large full-stack test depending on that change (Reland of https://codereview.webrtc.org/2741823003/) > > TBR=stefan@webrtc.org,tommi@webrtc.org > > BUG=webrtc:7301,webrtc:7325 > > > > Review-Url: https://codereview.webrtc.org/2744003002 > > Cr-Commit-Position: refs/heads/master@{#17196} > > Committed:8c0a5896d1> > TBR=stefan@webrtc.org,tommi@webrtc.org,sprang@webrtc.org > # Skipping CQ checks because original CL landed less than 1 days ago. > NOPRESUBMIT=true > NOTREECHECKS=true > NOTRY=true > BUG=webrtc:7301,webrtc:7325 > > Review-Url: https://codereview.webrtc.org/2748643002 > Cr-Commit-Position: refs/heads/master@{#17198} > Committed:382a72a0d3BUG=webrtc:7301,webrtc:7325 Review-Url: https://codereview.webrtc.org/2750473002 Cr-Commit-Position: refs/heads/master@{#17253}