YuvConverter was left package protected by mistake in the previous change. Bug: None Change-Id: I2235f745c2f36f9b49199a3dad09da78f63c33e3 Reviewed-on: https://webrtc-review.googlesource.com/11980 Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20322}