Revert of [Chromecast] Ignore interfaces not used to connect to internet. (patchset #1 id:1 of https://codereview.chromium.org/1137483004/)

Reason for revert:
broke the Android builds. Not sure how "cast_shell_android" passed, actually.

Original issue's description:
> [Chromecast] Ignore interfaces not used to connect to internet.
>
> Add NetworkChangeNotifierFactoryCast to create instance of
> NetworkChangeNotifierLinux that ignores interfaces that will not be
> used to connect to internet.
>
> BUG=469863
> R=gunsch@chromium.org,byungchul@chromium.org,wzhong@chromium.org
>
> Committed: https://crrev.com/561d7adb5ec842c5e56ece4524d0e486691ca614
> Cr-Commit-Position: refs/heads/master@{#329319}

TBR=byungchul@chromium.org,wzhong@chromium.org,derekjchow@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=469863

Review URL: https://codereview.chromium.org/1141503002

Cr-Commit-Position: refs/heads/master@{#329348}
6 files changed