Rename EME WD call parameters

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index 9e1a29dacb9f85ff8cca1146ec76de4aac2b0f5b..1277c6368ed2fd1037a20deccb2e64f5332e382f 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -2269,35 +2269,35 @@ PP_Var PepperPluginInstanceImpl::GetDefaultCharSet(PP_Instance instance) {
 // Therefore, |content_decryptor_delegate_| must have been initialized when
 // the following methods are called.
 void PepperPluginInstanceImpl::SessionCreated(PP_Instance instance,
-                                              uint32_t reference_id,
-                                              PP_Var session_id_var) {
-  content_decryptor_delegate_->OnSessionCreated(reference_id, session_id_var);
+                                              uint32_t session_id,
+                                              PP_Var web_session_id_var) {
+  content_decryptor_delegate_->OnSessionCreated(session_id, web_session_id_var);
 }
 
 void PepperPluginInstanceImpl::SessionMessage(PP_Instance instance,
-                                              uint32_t reference_id,
+                                              uint32_t session_id,
                                               PP_Var message_var,
                                               PP_Var destination_url) {
   content_decryptor_delegate_->OnSessionMessage(
-      reference_id, message_var, destination_url);
+      session_id, message_var, destination_url);
 }
 
 void PepperPluginInstanceImpl::SessionReady(PP_Instance instance,
-                                            uint32_t reference_id) {
-  content_decryptor_delegate_->OnSessionReady(reference_id);
+                                            uint32_t session_id) {
+  content_decryptor_delegate_->OnSessionReady(session_id);
 }
 
 void PepperPluginInstanceImpl::SessionClosed(PP_Instance instance,
-                                             uint32_t reference_id) {
-  content_decryptor_delegate_->OnSessionClosed(reference_id);
+                                             uint32_t session_id) {
+  content_decryptor_delegate_->OnSessionClosed(session_id);
 }
 
 void PepperPluginInstanceImpl::SessionError(PP_Instance instance,
-                                            uint32_t reference_id,
+                                            uint32_t session_id,
                                             int32_t media_error,
                                             int32_t system_code) {
   content_decryptor_delegate_->OnSessionError(
-      reference_id, media_error, system_code);
+      session_id, media_error, system_code);
 }
 
 void PepperPluginInstanceImpl::DeliverBlock(