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 da24f1228d30a3afda012d08f1a1ca33f0e161b8..66e794680456586e4d690866e9240e06cb82b102 100644
--- a/media/audio/linux/audio_manager_linux.cc
+++ b/media/audio/linux/audio_manager_linux.cc
@@ -50,7 +50,7 @@ bool AudioManagerLinux::HasAudioInputDevices() {
 AudioOutputStream* AudioManagerLinux::MakeAudioOutputStream(
     const AudioParameters& params) {
   // Early return for testing hook.
-  if (params.format == AudioParameters::AUDIO_MOCK)
+  if (params.format() == AudioParameters::AUDIO_MOCK)
     return FakeAudioOutputStream::MakeFakeStream(params);
 
   // Don't allow opening more than |kMaxOutputStreams| streams.
@@ -80,12 +80,12 @@ AudioOutputStream* AudioManagerLinux::MakeAudioOutputStream(
 
 AudioInputStream* AudioManagerLinux::MakeAudioInputStream(
     const AudioParameters& params, const std::string& device_id) {
-  if (!params.IsValid() || params.channels > kMaxInputChannels ||
+  if (!params.IsValid() || params.channels() > kMaxInputChannels ||
       device_id.empty()) {
     return NULL;
   }
 
-  if (params.format == AudioParameters::AUDIO_MOCK) {
+  if (params.format() == AudioParameters::AUDIO_MOCK) {
     return FakeAudioInputStream::MakeFakeStream(params);
   }