Revert of Updates the mic icon status based on the device's audio state.

Revert of Updates the mic icon status based on the device's audio state. (patchset #5 id:80001 of https://codereview.chromium.org/752253002/)

Reason for revert:
Caused assertion failures in debug Linux ChromiumOS browser_tests; see Issue 383624 for details.

Original issue's description:
> Updates the mic icon status based on the device's audio state.
>
> BUG=383624
> R=amistry@chromium.org, tapted@chromium.org, oshima@chromium.org
> TEST=manually
>
> Committed: https://crrev.com/3f492b65105964526ca8dc5d6a66971c0a427cdd
> Cr-Commit-Position: refs/heads/master@{#306296}

TBR=amistry@chromium.org,tapted@chromium.org,oshima@chromium.org,mukai@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=383624
Committed: https://crrev.com/c029af72efe407ee80dac6c16e26edc922b3c066
Cr-Commit-Position: refs/heads/master@{#306329}

[Ken Russell (switch to Gerrit), 2014-12-02 02:24:25]

Created Revert of Updates the mic icon status based on the device's audio state.

[commit-bot: I haz the power, 2014-12-02 02:25:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/774553002/1

[commit-bot: I haz the power, 2014-12-02 02:26:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-02 02:27:38]

Patchset 1 (id:??) landed as
https://crrev.com/c029af72efe407ee80dac6c16e26edc922b3c066
Cr-Commit-Position: refs/heads/master@{#306329}