Reland of Don't reinit encoder when rotation changes. (patchset #1 id:1 of https://codereview.webrtc.org/2861633003/ )
Reason for revert:
Fix compile.
Original issue's description:
> Revert of Don't reinit encoder when rotation changes. (patchset #3 id:40001 of https://codereview.webrtc.org/2853463004/ )
>
> Reason for revert:
> Breaks compile on buildbots.
>
> Original issue's description:
> > Don't reinit encoder when rotation changes.
> >
> > TESTED=By rotating phone in AppRTCMobile.
> > BUG=webrtc:7535
> >
> > Review-Url: https://codereview.webrtc.org/2853463004
> > Cr-Commit-Position: refs/heads/master@{#17985}
> > Committed: 70e39e159e
>
> TBR=magjed@webrtc.org,asapersson@webrtc.org,perkj@webrtc.org,sprang@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7535
>
> Review-Url: https://codereview.webrtc.org/2861633003
> Cr-Commit-Position: refs/heads/master@{#17987}
> Committed: 823e900d2c
TBR=magjed@webrtc.org,asapersson@webrtc.org,perkj@webrtc.org,sprang@webrtc.org
NOPRESUBMIT=true
BUG=webrtc:7535
Review-Url: https://codereview.webrtc.org/2861443004
Cr-Commit-Position: refs/heads/master@{#17988}
a324166682