Make AudioParameters a class instead of a struct

content/renderer/pepper/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper/pepper_plugin_delegate_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_delegate_impl.cc b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
index 8945bdb6144a5f171af6ec13894fa82d2a5f1cf1..ea1cd74c1715bc788acecf34eba7e7f8f108dc30 100644
--- a/content/renderer/pepper/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
@@ -598,8 +598,8 @@ PepperPluginDelegateImpl::CreateAudioOutput(
     uint32_t sample_rate,
     uint32_t sample_count,
     webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client) {
-  return PepperPlatformAudioOutputImpl::Create(sample_rate, sample_count,
-                                               client);
+  return PepperPlatformAudioOutputImpl::Create(
+      static_cast<int>(sample_rate), static_cast<int>(sample_count), client);
 }
 
 webkit::ppapi::PluginDelegate::PlatformAudioInput*
@@ -607,8 +607,8 @@ PepperPluginDelegateImpl::CreateAudioInput(
     uint32_t sample_rate,
     uint32_t sample_count,
     webkit::ppapi::PluginDelegate::PlatformAudioCommonClient* client) {
-  return PepperPlatformAudioInputImpl::Create(sample_rate, sample_count,
-                                              client);
+  return PepperPlatformAudioInputImpl::Create(
+      static_cast<int>(sample_rate), static_cast<int>(sample_count), client);
 }
 
 // If a broker has not already been created for this plugin, creates one.