Revert 217691 "Merge 217276 "Add media::VideoEncodeAccelerator w..."

Revert 217691 "Merge 217276 "Add media::VideoEncodeAccelerator w..."

> Merge 217276 "Add media::VideoEncodeAccelerator with WebRTC inte..."
> 
> > Add media::VideoEncodeAccelerator with WebRTC integration
> > 
> > * Adds media::VideoEncodeAccelerator class.
> > * Add GpuVideoEncodeAccelerator{,Host} classes and appropriate IPC.
> > * Integrates into WebRTC stack with RTCVideoEncoderFactory/RTCVideoEncoder.
> > * Rename media::GpuVideoDecodeFactories -> media::GpuVideoAcceleratorFactories
> >   and generalize for use by the encode accelerator implementations as well.
> > 
> > BUG=260210
> > BUG=170345
> > TEST=local build, run on CrOS snow; local build, unittests on desktop Linux
> > 
> > Review URL: https://chromiumcodereview.appspot.com/20632002
> 
> TBR=sheu@chromium.org
> 
> Review URL: https://codereview.chromium.org/22875014

TBR=karen@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=218294

[kareng, 2013-08-19 19:11:50]

Committed patchset #1 manually as r218294.