Reland of Add mojo interface+impl creation of audio streams.

Reland of Add mojo interface+impl creation of audio streams. (patchset #1 id:1 of https://codereview.chromium.org/2788173002/ )

Reason for revert:
Fixed issue: https://codereview.chromium.org/2788363002/. Reusing LGTMs since the CL is unchanged.

Original issue's description:
> 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
> 
> TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chromium.org,olka@chromium.org,rockot@chromium.org,maxmorin@chromium.org
> # 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}
> Committed: https://chromium.googlesource.com/chromium/src/+/925d324b60de6538885b1f74b214b7ca76caca1a

TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chromium.org,olka@chromium.org,rockot@chromium.org,caseq@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=425368
Review-Url: https://codereview.chromium.org/2792293002
Cr-Commit-Position: refs/heads/master@{#461660}
Committed: https://chromium.googlesource.com/chromium/src/+/2781f5ff2c35d8d4d51205592a72f2ec28968ace

[Max Morin, 2017-04-04 07:22:56]

The CQ bit was checked by maxmorin@chromium.org

[Max Morin, 2017-04-04 07:22:57]

Created Reland of Add mojo interface+impl creation of audio streams.

[commit-bot: I haz the power, 2017-04-04 07:23:07]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-04 08:29:45]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491290576820810, "parent_rev":
"784c7ca7eb7a7b97cb9d4aa83536a930cec48ba0", "commit_rev":
"2781f5ff2c35d8d4d51205592a72f2ec28968ace"}

[commit-bot: I haz the power, 2017-04-04 08:30:31]

Description was changed from

==========
Reland of Add mojo interface+impl creation of audio streams. (patchset #1 id:1
of https://codereview.chromium.org/2788173002/ )

Reason for revert:
Fixed issue: https://codereview.chromium.org/2788363002/. Reusing LGTMs since
the CL is unchanged.

Original issue's description:
> 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_DLmz2AIU9iweC0zEYlVuHCvEIRQepeYyx...
> >  * 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/+/8757b429c30f14d20697f7c6fe4d...
> 
>
TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chr...
> # 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}
> Committed:
https://chromium.googlesource.com/chromium/src/+/925d324b60de6538885b1f74b214...

TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chr...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=425368
==========

to

==========
Reland of Add mojo interface+impl creation of audio streams. (patchset #1 id:1
of https://codereview.chromium.org/2788173002/ )

Reason for revert:
Fixed issue: https://codereview.chromium.org/2788363002/. Reusing LGTMs since
the CL is unchanged.

Original issue's description:
> 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_DLmz2AIU9iweC0zEYlVuHCvEIRQepeYyx...
> >  * 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/+/8757b429c30f14d20697f7c6fe4d...
> 
>
TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chr...
> # 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}
> Committed:
https://chromium.googlesource.com/chromium/src/+/925d324b60de6538885b1f74b214...

TBR=dalecurtis@chromium.org,asvitkine@chromium.org,avi@chromium.org,mkwst@chr...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=425368

Review-Url: https://codereview.chromium.org/2792293002
Cr-Commit-Position: refs/heads/master@{#461660}
Committed:
https://chromium.googlesource.com/chromium/src/+/2781f5ff2c35d8d4d51205592a72...
==========

[commit-bot: I haz the power, 2017-04-04 08:30:33]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2781f5ff2c35d8d4d51205592a72...