There is no need to hold on to the render thread after the OES texture buffer has been created. toI420() is handled by the thread in the SurfaceTextureHelper. Bug: webrtc:9391 Change-Id: Ide081bc083db72bb991f1deba74d3cecf3e1fee6 Reviewed-on: https://webrtc-review.googlesource.com/84121 Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23652}