iOS audio session isInterrupted flag does not get reset correctly:

webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm

Index: webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm
diff --git a/webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm b/webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm
index 82f4426482ad3f93ecdafe3600d1f3335a043d80..c9fd788ace88e6c6e9761861a95ca4bd1a8d4bbe 100644
--- a/webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm
+++ b/webrtc/modules/audio_device/ios/audio_device_unittest_ios.mm
@@ -825,6 +825,12 @@ TEST_F(AudioDeviceTest, DISABLED_MeasureLoopbackLatency) {
   latency_audio_stream->PrintResults();
 }
 
+// Verifies that the AudioDeviceIOS is_interrupted_ flag is reset correctly after an iOS

[henrika_webrtc, 2017/05/11 08:00:28]

Please use 80 characters per line as in rest of the file.

+// AVAudioSessionInterruptionTypeEnded notification event.
+// When AudioDeviceIOS is interrupted, is_interrupted_ set to true.

[henrika_webrtc, 2017/05/11 08:00:28]

'is_interrupted is set to true'

+// When the audio is stopped, the RTCAudioSessionDelegate would be removed.
+// Then when the iOS AVAudioSessionInterruptionTypeEnded notification is received, the event
+// is not passed to the delegate as it is no longer in the delegates list.

[henrika_webrtc, 2017/05/11 08:00:28]

Could you make it more clear that this is the expected behaviour, e.g. by using
'should' instead of 'is' here?

 TEST_F(AudioDeviceTest, testInterruptedAudioSession) {
   RTCAudioSession *session = [RTCAudioSession sharedInstance];
   std::unique_ptr<webrtc::AudioDeviceIOS> audio_device;