Revert of [Chromecast] Ignore interfaces not used to connect to internet.

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
Committed: https://crrev.com/4b40fb3b268414b5d6cbf2987a901287b6ddc6da
Cr-Commit-Position: refs/heads/master@{#329348}

[gunsch, 2015-05-12 04:20:42]

Created Revert of [Chromecast] Ignore interfaces not used to connect to
internet.

[commit-bot: I haz the power, 2015-05-12 04:21:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1141503002/1

[commit-bot: I haz the power, 2015-05-12 04:22:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-12 04:23:22]

Patchset 1 (id:??) landed as
https://crrev.com/4b40fb3b268414b5d6cbf2987a901287b6ddc6da
Cr-Commit-Position: refs/heads/master@{#329348}