Make AudioParameters a class instead of a struct

content/renderer/pepper/pepper_platform_audio_output_impl.cc

Index: content/renderer/pepper/pepper_platform_audio_output_impl.cc
diff --git a/content/renderer/pepper/pepper_platform_audio_output_impl.cc b/content/renderer/pepper/pepper_platform_audio_output_impl.cc
index 1b3a02ec6a49fed997b63aa5ed5ed054f3cf7136..a2c67aa0d75fee77fb97066c0c5c0e1863946299 100644
--- a/content/renderer/pepper/pepper_platform_audio_output_impl.cc
+++ b/content/renderer/pepper/pepper_platform_audio_output_impl.cc
@@ -28,8 +28,8 @@ PepperPlatformAudioOutputImpl::~PepperPlatformAudioOutputImpl() {
 }
 
 bool PepperPlatformAudioOutputImpl::Initialize(
-    uint32_t sample_rate,
-    uint32_t sample_count,
+    uint32_t samples_per_second,
+    uint32_t samples_per_packet,
     webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client) {
   DCHECK(client);
   // Make sure we don't call init more than once.
@@ -37,20 +37,19 @@ bool PepperPlatformAudioOutputImpl::Initialize(
 
   client_ = client;
 
-  AudioParameters params;
+  AudioParameters::Format format;
   const uint32_t kMaxSampleCountForLowLatency = 2048;
   // Use the low latency back end if the client request is compatible, and
   // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY.
-  if (sample_rate == audio_hardware::GetOutputSampleRate() &&
-      sample_count <= kMaxSampleCountForLowLatency &&
-      sample_count % audio_hardware::GetOutputBufferSize() == 0)
-    params.format = AudioParameters::AUDIO_PCM_LOW_LATENCY;
+  if (samples_per_second == audio_hardware::GetOutputSampleRate() &&
+      samples_per_packet <= kMaxSampleCountForLowLatency &&
+      samples_per_packet % audio_hardware::GetOutputBufferSize() == 0)
+    format = AudioParameters::AUDIO_PCM_LOW_LATENCY;
   else
-    params.format = AudioParameters::AUDIO_PCM_LINEAR;
-  params.channels = 2;
-  params.sample_rate = sample_rate;
-  params.bits_per_sample = 16;
-  params.samples_per_packet = sample_count;
+    format = AudioParameters::AUDIO_PCM_LINEAR;
+
+  AudioParameters params(format, CHANNEL_LAYOUT_STEREO, samples_per_second,
+                         16, samples_per_packet);
 
   ChildProcess::current()->io_message_loop()->PostTask(
       FROM_HERE,