Set WebRtcVideoEngine2 as the WebRtcMediaEngine.
Set WebRtcVideoEngine2 as the WebRtcMediaEngine.

Removes the experiment launching WebRTC-NewVideoAPI. This field trial
has shown no major regressions on Chrome Canary/Dev that haven't been
addressed, so enabling it in time before feature freeze.

BUG=1788
R=mflodman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/44759004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8809}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 66df3cf7ab7c2fa743d428cb1b44197906810141

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