GitLab

Reason for revert:
I should've checked sooner; this is apparently still used by Flash. (See go/UMA, histograms, Pepper.InterfaceUsed)

Original issue's description:
> Remove unused PPB_View_Dev
>
> TBR=binji@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/2210d5fb49cd4b75972f2e304b29637c050de4f1

TBR=binji@chromium.org,raymes@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/512703003

Cr-Commit-Position: refs/heads/master@{#292152}