update custom elements and shadow dom

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 29b2825fe0c3c63eaadad5398cc8177616502a3e..f966796cd656f9c85671bcaa6fa5377e1ca38308 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -7813,7 +7813,7 @@ class Document extends Node  native "Document"
 
   /// Checks if [register] is supported on the current platform.
   bool get supportsRegister {
-    return JS('bool', '("register" in #)', this);
+    return JS('bool', '("registerElement" in #)', this);
   }
 
   @DomName('Document.createElement')
@@ -35161,7 +35161,7 @@ void _registerCustomElement(context, document, String tag, Type type,
   //          }
   //        }
   //    });
-  //    document.register('x-foo', { prototype: proto });
+  //    document.registerElement('x-foo', { prototype: proto });
   //    ...
   //    var e = document.createElement('x-foo');
 
@@ -35205,9 +35205,9 @@ void _registerCustomElement(context, document, String tag, Type type,
   JS('void', '#.createdCallback = #', properties,
       JS('=Object', '{value: #}',
           _makeCallbackMethod(_callConstructor(constructor, interceptor))));
-  JS('void', '#.enteredViewCallback = #', properties,
+  JS('void', '#.attachedCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callEnteredView)));
-  JS('void', '#.leftViewCallback = #', properties,
+  JS('void', '#.detachedCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod(_callLeftView)));
   JS('void', '#.attributeChangedCallback = #', properties,
       JS('=Object', '{value: #}', _makeCallbackMethod3(_callAttributeChanged)));
@@ -35223,7 +35223,7 @@ void _registerCustomElement(context, document, String tag, Type type,
     JS('=Object', '#.extends = #', options, extendsTagName);
   }
 
-  JS('void', '#.register(#, #)', document, tag, options);
+  JS('void', '#.registerElement(#, #)', document, tag, options);
 }
 
 //// Called by Element.created to do validation & initialization.