Delete method webrtc::VideoFrame::Reset.

Mainly affects VideoCaptureInput.

BUG=webrtc:5682

Review URL: https://codereview.webrtc.org/1889443002

Cr-Original-Commit-Position: refs/heads/master@{#12439}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: c7fe3c27ebdf4f33934c17a938841a3aa98ef5c6
7 files changed