Revert of CodecOwner: Don't look at definitions for classes we don't link with

Revert of CodecOwner: Don't look at definitions for classes we don't link with (patchset #1 id:1 of https://codereview.webrtc.org/1364233002/ )

Reason for revert:
Breaking Chromium FYI bots.

Original issue's description:
> CodecOwner: Don't look at definitions for classes we don't link with
>
> It's good hygiene and just generally the right thing to do. And
> apparently at least sometimes required by Microsoft's compiler.
>
> Committed: https://crrev.com/f4d38ea57aa739b525066b095468cb4af1d2799b
> Cr-Commit-Position: refs/heads/master@{#10060}

TBR=henrik.lundin@webrtc.org,tommi@webrtc.org,kwiberg@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/a53e383d7dfb1e655e2b0e082eb26ea0407fb285
Cr-Commit-Position: refs/heads/master@{#10068}

[the sun, 2015-09-25 08:30:49]

Created Revert of CodecOwner: Don't look at definitions for classes we don't
link with

[commit-bot: I haz the power, 2015-09-25 08:30:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1368083002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1368083002/1

[commit-bot: I haz the power, 2015-09-25 08:31:01]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-25 08:31:11]

Patchset 1 (id:??) landed as
https://crrev.com/a53e383d7dfb1e655e2b0e082eb26ea0407fb285
Cr-Commit-Position: refs/heads/master@{#10068}

[kwiberg-webrtc, 2015-09-25 09:32:59]

On 2015/09/25 08:31:11, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/a53e383d7dfb1e655e2b0e082eb26ea0407fb285
> Cr-Commit-Position: refs/heads/master@{#10068}

lgtm