Revert 198556 "Implement the rest of the audio API."

Revert 198556 "Implement the rest of the audio API."

> Implement the rest of the audio API.
> Picking up where https://codereview.chromium.org/13486004/ left off, implemented the setProperties and setActiveDevices calls; also fixed GetNodes to also return the volume of the devices.
> 
> R=hshi@chromium.org, jennyz@chromium.org, mpcomplete@chromium.org
> BUG=175798
> TEST=Wrote a test extension to set the volume on the active and inactive devices, to verify they were set correctly. Also wrote code to switch active devices to verify that the devices did switch.
> 
> Review URL: https://codereview.chromium.org/14652027

TBR=rkc@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=198568

[rkc, 2013-05-07 00:05:00]

Committed patchset #1 manually as r198568.

[Matt Perry, 2013-05-07 00:22:45]

Could you check in a CL with just the _permission_features.json change today?

[rkc, 2013-05-07 00:24:46]

On 2013/05/07 00:22:45, Matt Perry wrote:
> Could you check in a CL with just the _permission_features.json change today?

I already have this fixed, I am just waiting for the VM to build so I can test
it. It was a really trivial fix.

[Matt Perry, 2013-05-07 00:38:18]

On 2013/05/07 00:24:46, Rahul Chaturvedi wrote:
> On 2013/05/07 00:22:45, Matt Perry wrote:
> > Could you check in a CL with just the _permission_features.json change
today?
> 
> I already have this fixed, I am just waiting for the VM to build so I can test
> it. It was a really trivial fix.

OK, as long as the _permission_features change makes it in before the branch
point.