Enable new getUserMedia audio constraints algorithm behind a flag.

content/renderer/media/webrtc/webrtc_media_stream_adapter_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webrtc/webrtc_media_stream_adapter.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 43 matching lines @@
       blink::WebMediaStreamSource audio_source;
       audio_source.Initialize("audio", blink::WebMediaStreamSource::kTypeAudio,
                               "audio", false /* remote */);
       ProcessedLocalAudioSource* const source = new ProcessedLocalAudioSource(
           -1 /* consumer_render_frame_id is N/A for non-browser tests */,
           StreamDeviceInfo(MEDIA_DEVICE_AUDIO_CAPTURE, "Mock audio device",
                            "mock_audio_device_id",
                            media::AudioParameters::kAudioCDSampleRate,
                            media::CHANNEL_LAYOUT_STEREO,
                            media::AudioParameters::kAudioCDSampleRate / 50),
-          MockConstraintFactory().CreateWebMediaConstraints(),
+          AudioProcessingProperties(),
           base::Bind(&WebRtcMediaStreamAdapterTest::OnAudioSourceStarted),
           dependency_factory_.get());
       source->SetAllowInvalidRenderFrameIdForTesting(true);
       audio_source.SetExtraData(source);  // Takes ownership.
       audio_track_vector[0].Initialize(audio_source);
       EXPECT_CALL(*mock_audio_device_factory_.mock_capturer_source(),
                   Initialize(_, _, -1));
       EXPECT_CALL(*mock_audio_device_factory_.mock_capturer_source(),
                   SetAutomaticGainControl(true));
       EXPECT_CALL(*mock_audio_device_factory_.mock_capturer_source(), Start());
@@ skipping 100 matching lines @@
   EXPECT_TRUE(webrtc_stream()->GetVideoTracks().empty());
 
   native_stream->AddTrack(audio_tracks[0]);
   EXPECT_EQ(1u, webrtc_stream()->GetAudioTracks().size());
 
   native_stream->AddTrack(video_tracks[0]);
   EXPECT_EQ(1u, webrtc_stream()->GetVideoTracks().size());
 }
 
 }  // namespace content