Use EventHandler type instead of EventListener for event handler attributes

Source/modules/speech/SpeechSynthesisUtterance.idl

Index: Source/modules/speech/SpeechSynthesisUtterance.idl
diff --git a/Source/modules/speech/SpeechSynthesisUtterance.idl b/Source/modules/speech/SpeechSynthesisUtterance.idl
index 916d51d5d01c4a8c980362b1e34b5553b62d9e55..d9b02e665ece3a8b3e7ec3a465cb5bfddf649890 100644
--- a/Source/modules/speech/SpeechSynthesisUtterance.idl
+++ b/Source/modules/speech/SpeechSynthesisUtterance.idl
@@ -35,11 +35,11 @@
     attribute float rate;
     attribute float pitch;
 
-    attribute EventListener onstart;
-    attribute EventListener onend;
-    attribute EventListener onerror;
-    attribute EventListener onpause;
-    attribute EventListener onresume;
-    attribute EventListener onmark;
-    attribute EventListener onboundary;
+    attribute EventHandler onstart;
+    attribute EventHandler onend;
+    attribute EventHandler onerror;
+    attribute EventHandler onpause;
+    attribute EventHandler onresume;
+    attribute EventHandler onmark;
+    attribute EventHandler onboundary;
 };