8177452698
If the input to H264VideoToolBoxEncoder is a native CVPixelBuffer and the quality scaler requests scaling, we fall back to a slow path where the buffer is converted from NV12 to I420 on the CPU and then uploaded to a native CVPixelBuffer again. It turns out this scaling is not needed and that the H264VideoToolBoxEncoder can handle the scaling internally. BUG=b/30939444 Review-Url: https://codereview.webrtc.org/2258103003 Cr-Commit-Position: refs/heads/master@{#13835}