Reland of [Chromecast] Change chromecast_branding to public (patchset #1 id:1 of https://codereview.chromium.org/1266723002/)

Reason for revert:
retrieve the branding change CL since internal CL is submitted.

Original issue's description:
> Revert of [Chromecast] Change chromecast_branding to public (patchset #6 id:100001 of https://codereview.chromium.org/1262673004/)
>
> Reason for revert:
> Revert the CL temporary for TOT build. Checked in again once the internal CLs are approved.
>
> Original issue's description:
> > [Chromecast] Change chromecast_branding to public
> >
> > Change chromecast_branding from Chrome/Chromium to
> > public/internal/google in gyp file. "public" is the same as "Chromium"
> > and the other two are considered as "Chrome".
> >
> > BUG=
> >
> > Committed: https://crrev.com/0f46bd94566380a99ecda0753f659b7e114e3d3d
> > Cr-Commit-Position: refs/heads/master@{#341016}
>
> TBR=lcwu@chromium.org,gunsch@chromium.org,byungchul@chromium.org,slan@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/cc83429750aac56eef9068fcd617d4474d310960
> Cr-Commit-Position: refs/heads/master@{#341034}

TBR=lcwu@chromium.org,gunsch@chromium.org,byungchul@chromium.org,slan@chromium.org,gunsch@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1256323009

Cr-Commit-Position: refs/heads/master@{#341191}
8 files changed