Revert of Add mojo interface+impl creation of audio streams. (patchset #9 id:360001 of https://codereview.chromium.org/2697663003/ )

Reason for revert:
Broke sizes test on linux x64: https://build.chromium.org/p/chromium/builders/Linux%20x64/builds/36560

Original issue's description:
> Add mojo interface+impl creation of audio streams.
>
> Summary:
>  * RendererAudioOutputStreamFactory is an interface for creating
>  AudioOutputProviders.
>  * Since a lot of data is common for all factories of a single renderer
>    process, it is held in a context object.
>    (AudioOutputStreamFactoryContext is per-process and
>    RendererAudioOutputStreamFactory is per-frame).
>  * Replaces AudioRendererHost (eventually, after field trials).
>  * Follow-up on https://codereview.chromium.org/2697793002/.
>  * Design doc at https://docs.google.com/document/d/1awQoajq_DLmz2AIU9iweC0zEYlVuHCvEIRQepeYyxh8/edit
>  * audio_output_stream_factory_context_impl_unittest.cc is actually an
>    integration test, but it seems common to suffix test files with
>    "_unittest" anyways, so I did that.
>
>
> BUG=425368
>
> Review-Url: https://codereview.chromium.org/2697663003
> Cr-Commit-Position: refs/heads/master@{#461103}
> Committed: https://chromium.googlesource.com/chromium/src/+/8757b429c30f14d20697f7c6fe4dfdd510cf0b7f

[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=425368

Review-Url: https://codereview.chromium.org/2788173002
Cr-Commit-Position: refs/heads/master@{#461157}
11 files changed