Reland 15721002: Hook up the device selection to the WebAudio live audio

media/audio/audio_parameters.h

Index: media/audio/audio_parameters.h
diff --git a/media/audio/audio_parameters.h b/media/audio/audio_parameters.h
index dcc9eae44705a7f5f9bf77cd2e600d7d24a2bbb3..02a6f9661ccb5b4ccce28740277a8fca1f11098b 100644
--- a/media/audio/audio_parameters.h
+++ b/media/audio/audio_parameters.h
@@ -79,6 +79,16 @@ class MEDIA_EXPORT AudioParameters {
   // Set to CHANNEL_LAYOUT_DISCRETE with given number of channels.
   void SetDiscreteChannels(int channels);
 
+  // Comparison with other AudioParams.
+  bool operator==(const AudioParameters& other) const {
+    return format_ == other.format() &&
+           channel_layout_ == other.channel_layout() &&
+           channels_ == other.channels() &&
+           input_channels_ == other.input_channels() &&
+           bits_per_sample_ == other.bits_per_sample() &&
+           frames_per_buffer_ == other.frames_per_buffer();
+  }
+
  private:
   Format format_;                 // Format of the stream.
   ChannelLayout channel_layout_;  // Order of surround sound channels.