Reason for revert: Broke downstream project. Original issue's description: > Delete cricket::VideoFrame::GetTimeStamp. > > TBR=tkchin@webrtc.org # Trivial change to VideoRendererAdapter > BUG=webrtc:5682 > > Committed: https://crrev.com/fd6c99e43137d01fa6c120f7160f7c2999d1d8a3 > Cr-Commit-Position: refs/heads/master@{#14037} TBR=perkj@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:5682 Review-Url: https://codereview.webrtc.org/2306953002 Cr-Commit-Position: refs/heads/master@{#14038}