diff --git a/pkg/compiler/test/analyses/api_allowed.json b/pkg/compiler/test/analyses/api_allowed.json
index 52908c42ef4..71b72de907c 100644
--- a/pkg/compiler/test/analyses/api_allowed.json
+++ b/pkg/compiler/test/analyses/api_allowed.json
@@ -30,10 +30,7 @@
     "Dynamic invocation of 'call'.": 2,
     "Dynamic access of 'attributes'.": 1,
     "Dynamic invocation of '[]'.": 1,
-    "Dynamic invocation of 'toLowerCase'.": 1,
-    "Dynamic invocation of 'attached'.": 1,
-    "Dynamic invocation of 'detached'.": 1,
-    "Dynamic invocation of 'attributeChanged'.": 1
+    "Dynamic invocation of 'toLowerCase'.": 1
   },
   "org-dartlang-sdk:///lib/html/html_common/conversions.dart": {
     "Dynamic invocation of '[]='.": 1
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index cb75d05f3f7..26d027a6229 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -40150,15 +40150,16 @@ _callConstructor(constructor, interceptor) {
   };
 }
 
-_callAttached(receiver) {
+_callAttached(Element receiver) {
   return receiver.attached();
 }
 
-_callDetached(receiver) {
+_callDetached(Element receiver) {
   return receiver.detached();
 }
 
-_callAttributeChanged(receiver, name, oldValue, newValue) {
+_callAttributeChanged(
+    Element receiver, String name, String oldValue, String newValue) {
   return receiver.attributeChanged(name, oldValue, newValue);
 }
 
diff --git a/tools/dom/src/dart2js_CustomElementSupport.dart b/tools/dom/src/dart2js_CustomElementSupport.dart
index 8f7a9dd47b1..c4c49bdb391 100644
--- a/tools/dom/src/dart2js_CustomElementSupport.dart
+++ b/tools/dom/src/dart2js_CustomElementSupport.dart
@@ -16,15 +16,16 @@ _callConstructor(constructor, interceptor) {
   };
 }
 
-_callAttached(receiver) {
+_callAttached(Element receiver) {
   return receiver.attached();
 }
 
-_callDetached(receiver) {
+_callDetached(Element receiver) {
   return receiver.detached();
 }
 
-_callAttributeChanged(receiver, name, oldValue, newValue) {
+_callAttributeChanged(
+    Element receiver, String name, String oldValue, String newValue) {
   return receiver.attributeChanged(name, oldValue, newValue);
 }