Changing onCreated callback to created.

tests/html/custom/attribute_changed_callback_test.dart

Index: tests/html/custom/attribute_changed_callback_test.dart
diff --git a/tests/html/custom/attribute_changed_callback_test.dart b/tests/html/custom/attribute_changed_callback_test.dart
index 3e78587c9b0ae07eccfefef8f2a05f9f17d12340..955399f3abe7dad56152e43df0a8310e4abe4533 100644
--- a/tests/html/custom/attribute_changed_callback_test.dart
+++ b/tests/html/custom/attribute_changed_callback_test.dart
@@ -13,7 +13,7 @@ class A extends HtmlElement {
 
   static var attributeChangedInvocations = 0;
 
-  void onAttributeChanged(name, oldValue, newValue) {
+  void attributeChanged(name, oldValue, newValue) {
     attributeChangedInvocations++;
   }
 }
@@ -24,11 +24,11 @@ class B extends HtmlElement {
 
   static var invocations = [];
 
-  void onCreated() {
+  void created() {
     invocations.add('created');
   }
 
-  void onAttributeChanged(name, oldValue, newValue) {
+  void attributeChanged(name, oldValue, newValue) {
     invocations.add('$name: $oldValue => $newValue');
   }
 }