Remove ViEFrameProviderBase.

BUG=1695
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/49349004

Cr-Original-Commit-Position: refs/heads/master@{#9252}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 36a1438a66b74628c1f9f3c4d3ea322156958169
16 files changed