Make AudioParameters a class instead of a struct

media/audio/linux/audio_manager_linux.cc

Index: media/audio/linux/audio_manager_linux.cc
diff --git a/media/audio/linux/audio_manager_linux.cc b/media/audio/linux/audio_manager_linux.cc
index faf93002c4c08157c3275fa52c5ee4785f0e88d7..c081c038242a4c5d997cabafad45a5da367780fd 100644
--- a/media/audio/linux/audio_manager_linux.cc
+++ b/media/audio/linux/audio_manager_linux.cc
@@ -238,25 +238,25 @@ bool AudioManagerLinux::HasAnyAlsaAudioDevice(StreamType stream) {
 
 AudioOutputStream* AudioManagerLinux::MakeLinearOutputStream(
     const AudioParameters& params) {
-  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
   return MakeOutputStream(params);
 }
 
 AudioOutputStream* AudioManagerLinux::MakeLowLatencyOutputStream(
     const AudioParameters& params) {
-  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
   return MakeOutputStream(params);
 }
 
 AudioInputStream* AudioManagerLinux::MakeLinearInputStream(
     const AudioParameters& params, const std::string& device_id) {
-  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
   return MakeInputStream(params, device_id);
 }
 
 AudioInputStream* AudioManagerLinux::MakeLowLatencyInputStream(
     const AudioParameters& params, const std::string& device_id) {
-  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
+  DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
   return MakeInputStream(params, device_id);
 }