Remove VPX conditionals from media and remoting.

Remove VPX conditionals from media and remoting.

We added some #ifdefs in https://codereview.chromium.org/501153003 to support compiling these components with no libvpx to get the GN build linking.

Now that chrome links in GN with libvpx, we can remove these since this isn't a configuration we want to support.

Committed: https://crrev.com/bbe9ed1510413458943b3b39e1e9dad3965e5d32
Cr-Commit-Position: refs/heads/master@{#297083}

[brettw, 2014-09-26 21:31:20]

brettw@chromium.org changed reviewers:
+ sergeyu@chromium.org

[Alpha Left Google, 2014-09-26 21:32:22]

hclam@chromium.org changed reviewers:
+ hclam@chromium.org

[Alpha Left Google, 2014-09-26 21:32:23]

media/cast LGTM.

[Sergey Ulanov, 2014-09-26 22:54:07]

LGTM, thanks!

[brettw, 2014-09-27 00:26:02]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2014-09-27 00:27:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/608013004/1

[commit-bot: I haz the power, 2014-09-27 00:32:42]

Committed patchset #1 (id:1) as 68ca86d2bd9838486a6903a3f6106c8743c904ff

[commit-bot: I haz the power, 2014-09-27 00:33:38]

Patchset 1 (id:??) landed as
https://crrev.com/bbe9ed1510413458943b3b39e1e9dad3965e5d32
Cr-Commit-Position: refs/heads/master@{#297083}