I420VideoFrame.CreateFrame: Removed unnecessary buffer size arguments.
I420VideoFrame.CreateFrame: Removed unnecessary buffer size arguments.

R=magjed@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/45629004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8732}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 93d9d6503e2bf2526af2b1c2cc46ef242b9843aa

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