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 ece53e0c48089cb480506bee99e86eee35b4570e..b464bb37bc92d5b0078acf3546422050a587c3b6 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.