Revert of Move audioproc_test_utils into enable_protobuf condition.

Revert of Move audioproc_test_utils into enable_protobuf condition. (patchset #1 id:1 of https://codereview.webrtc.org/1419533010/ )

Reason for revert:
I'm going to revert this and https://codereview.webrtc.org/1409943002 to get things back in a good state.

Original issue's description:
> Move audioproc_test_utils into enable_protobuf condition.
>
> From https://codereview.webrtc.org/1409943002 this target doesn't
> pass GYP on iOS unless build_with_libjingle==1.
> Our bots currently build with that, but we want to remove that GYP_DEFINES
> from the bots since http://www.webrtc.org/native-code/ios doesn't
> say it's needed.
>
> R=aluebs@webrtc.org
>
> Committed: https://crrev.com/e2a89251d9a75c2439daddd80f732ab505d0e1b9
> Cr-Commit-Position: refs/heads/master@{#10510}

TBR=andrew@webrtc.org,aluebs@webrtc.org,kjellander@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/f97bfed6c7af152765240a1ca414f967a519500e
Cr-Commit-Position: refs/heads/master@{#10521}

[kjellander (google.com), 2015-11-05 13:56:30]

Created Revert of Move audioproc_test_utils into enable_protobuf condition.

[commit-bot: I haz the power, 2015-11-05 13:56:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1428063007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1428063007/1

[commit-bot: I haz the power, 2015-11-05 13:56:39]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-11-05 13:56:40]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[kjellander_webrtc, 2015-11-05 14:01:19]

Made the revert with my google.com account :( lgtm'ing with webrtc.org to get
this in.

[kjellander_webrtc, 2015-11-05 14:01:23]

The CQ bit was checked by kjellander@webrtc.org

[commit-bot: I haz the power, 2015-11-05 14:01:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1428063007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1428063007/1

[commit-bot: I haz the power, 2015-11-05 14:02:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-05 14:02:28]

Patchset 1 (id:??) landed as
https://crrev.com/f97bfed6c7af152765240a1ca414f967a519500e
Cr-Commit-Position: refs/heads/master@{#10521}

[aluebs-webrtc, 2015-11-05 18:50:08]

lgtm