Make AudioParameters a class instead of a struct

content/renderer/media/webrtc_audio_device_impl.h

Index: content/renderer/media/webrtc_audio_device_impl.h
diff --git a/content/renderer/media/webrtc_audio_device_impl.h b/content/renderer/media/webrtc_audio_device_impl.h
index 36e37eac9132463ce0917649d061db66189e25db..4c43498a3903c6f6561e43b1cd0bd5f632f2be75 100644
--- a/content/renderer/media/webrtc_audio_device_impl.h
+++ b/content/renderer/media/webrtc_audio_device_impl.h
@@ -254,13 +254,23 @@ class CONTENT_EXPORT WebRtcAudioDeviceImpl
   void SetSessionId(int session_id);
 
   // Accessors.
-  size_t input_buffer_size() const { return input_buffer_size_; }
-  size_t output_buffer_size() const { return output_buffer_size_; }
-  int input_channels() const { return input_channels_; }
-  int output_channels() const { return output_channels_; }
-  int input_sample_rate() const { return static_cast<int>(input_sample_rate_); }
+  size_t input_buffer_size() const {
+    return input_audio_parameters_.frames_per_buffer();
+  }
+  size_t output_buffer_size() const {
+    return input_audio_parameters_.frames_per_buffer();
+  }
+  int input_channels() const {
+    return input_audio_parameters_.channels();
+  }
+  int output_channels() const {
+    return output_audio_parameters_.channels();
+  }
+  int input_sample_rate() const {
+    return input_audio_parameters_.sample_rate();
+  }
   int output_sample_rate() const {
-    return static_cast<int>(output_sample_rate_);
+    return output_audio_parameters_.sample_rate();
   }
   int input_delay_ms() const { return input_delay_ms_; }
   int output_delay_ms() const { return output_delay_ms_; }
@@ -295,12 +305,8 @@ class CONTENT_EXPORT WebRtcAudioDeviceImpl
   webrtc::AudioTransport* audio_transport_callback_;
 
   // Cached values of utilized audio parameters. Platform dependent.
-  size_t input_buffer_size_;
-  size_t output_buffer_size_;
-  int input_channels_;
-  int output_channels_;
-  double input_sample_rate_;
-  double output_sample_rate_;
+  AudioParameters input_audio_parameters_;
+  AudioParameters output_audio_parameters_;
 
   // Cached value of the current audio delay on the input/capture side.
   int input_delay_ms_;