Reland 597923002: Fix the way how we create webrtc::AudioProcessing in Chrome

Reland 597923002: Fix the way how we create webrtc::AudioProcessing in Chrome.

The original review thread is in https://codereview.chromium.org/588523002/

Fix the way how we create webrtc::AudioProcessing in Chrome.

TBR=tommi@chromium.org,maruel@chromium.org

BUG=415935
TEST=all webrtc tests in all bots + manual test to verify the agc loggings exist.

Committed: https://crrev.com/79ef9085fbdbc8e09ac989ea4d5f4c28e516bba9
Cr-Commit-Position: refs/heads/master@{#300509}

[no longer working on chromium, 2014-10-21 14:18:13]

xians@chromium.org changed reviewers:
+ maruel@chromium.org

[no longer working on chromium, 2014-10-21 14:29:00]

xians@chromium.org changed reviewers:
+ tommi@chromium.org

[no longer working on chromium, 2014-10-21 14:29:01]

Hi Tommi and Marc, I am going to reland this as
https://codereview.chromium.org/597923002, plus a fix that we will pass a handle
to libpeerconnection instead of a file stream.

[no longer working on chromium, 2014-10-21 14:33:11]

The CQ bit was checked by xians@chromium.org

[commit-bot: I haz the power, 2014-10-21 14:34:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/663413002/40001

[no longer working on chromium, 2014-10-21 15:02:42]

On 2014/10/21 14:34:01, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/663413002/40001


FYI, I have already verified that AEC dump works the AGC log is in
chrome://webrtc-log.

[no longer working on chromium, 2014-10-21 15:11:02]

The CQ bit was unchecked by xians@chromium.org

[no longer working on chromium, 2014-10-21 15:11:32]

The CQ bit was checked by xians@chromium.org

[commit-bot: I haz the power, 2014-10-21 15:12:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/663413002/60001

[commit-bot: I haz the power, 2014-10-21 17:16:52]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2014-10-21 17:17:38]

Patchset 4 (id:??) landed as
https://crrev.com/79ef9085fbdbc8e09ac989ea4d5f4c28e516bba9
Cr-Commit-Position: refs/heads/master@{#300509}

[no longer working on chromium, 2014-11-12 14:10:42]

A revert of this CL (patchset #4 id:60001) has been created in
https://codereview.chromium.org/717203002/ by xians@chromium.org.

The reason for reverting is: This CL broke the configuration of AudioProcessing,
we have to revert it to fix the echo issues it introduces..