Revert "Start of dartium custom element lifecycle event support."

tools/dom/src/native_DOMImplementation.dart

Index: tools/dom/src/native_DOMImplementation.dart
diff --git a/tools/dom/src/native_DOMImplementation.dart b/tools/dom/src/native_DOMImplementation.dart
index c6bed40859224cf51f5d3aa3238956630f13637d..333d747169094cd902e7e68bf34ccc424bfdf0a9 100644
--- a/tools/dom/src/native_DOMImplementation.dart
+++ b/tools/dom/src/native_DOMImplementation.dart
@@ -6,7 +6,7 @@ part of html;
 
 class _ConsoleVariables {
   Map<String, Object> _data = new Map<String, Object>();
-
+  
   /**
    * Forward member accesses to the backing JavaScript object.
    */
@@ -22,7 +22,7 @@ class _ConsoleVariables {
       return Function.apply(_data[member], invocation.positionalArguments, invocation.namedArguments);
     }
   }
-
+  
   void clear() => _data.clear();
 
   /**
@@ -93,17 +93,6 @@ class _Utils {
     return new UnsupportedError('[info: $fileName:$lineNo]');
   }
 
-  static bool isTypeSubclassOf(Type type, Type other) {
-    if (type == other) {
-      return true;
-    }
-    var superclass = reflectClass(type).superclass;
-    if (superclass != null) {
-      return isTypeSubclassOf(superclass.reflectedType, other);
-    }
-    return false;
-  }
-
   static window() native "Utils_window";
   static forwardingPrint(String message) native "Utils_forwardingPrint";
   static void spawnDomFunction(Function f, int replyTo) native "Utils_spawnDomFunction";
@@ -172,13 +161,13 @@ class _Utils {
       sb.write("final $arg");
       args[arg] = value;
     }
-
+    
     addArg("\$var", _consoleTempVariables);
-
+    
     for (int i = 0; i < locals.length; i+= 2) {
       addArg(locals[i], locals[i+1]);
     }
-    sb..write(')=>\n$expression');
+    sb..write(')=>\n$expression'); 
     return [sb.toString(), args.values.toList(growable: false)];
   }
 
@@ -195,10 +184,10 @@ class _Utils {
    * prepended to disambuguate. This scheme is simplistic but easy to encode and
    * decode. The use case for this method is displaying all map keys in a human
    * readable way in debugging tools.
-   */
+   */ 
   static List<String> getEncodedMapKeyList(dynamic obj) {
     if (obj is! Map) return null;
-
+    
     var ret = new List<String>();
     int i = 0;
     return obj.keys.map((key) {
@@ -282,18 +271,40 @@ class _Utils {
     return libName.startsWith('dart:');
   }
 
-  static void register(Document document, String tag, Type type,
-      String extendsTagName) {
+  static void register(String tag, Type type) {
     // TODO(vsm): Move these checks into native code.
+    if (type == null) {
+      throw new UnsupportedError("Invalid null type.");
+    }
     ClassMirror cls = reflectClass(type);
     if (_isBuiltinType(cls)) {
       throw new UnsupportedError("Invalid custom element from $libName.");
     }
-    _register(document, tag, type, extendsTagName);
+    ClassMirror superClass = cls.superclass;
+
+    Symbol objectName = reflectClass(Object).qualifiedName;
+    bool isRoot(ClassMirror cls) =>
+      cls == null || cls.qualifiedName == objectName;
+    // TODO(vsm): Support extending SvgElement as well.
+    Symbol elementName = reflectClass(HtmlElement).qualifiedName;
+    bool isElement(ClassMirror cls) =>
+      cls != null && cls.qualifiedName == elementName;
+
+    ClassMirror nativeClass = _isBuiltinType(superClass) ? superClass : null;
+    while(!isRoot(superClass) && !isElement(superClass)) {
+      superClass = superClass.superclass;
+      if (nativeClass == null && _isBuiltinType(superClass)) {
+        nativeClass = superClass;
+      }
+    }
+
+    if (isRoot(superClass)) {
+      throw new UnsupportedError("Invalid custom element doesn't inherit from HtmlElement.");
+    }
+    _register(tag, type, nativeClass.reflectedType);
   }
 
-  static void _register(Document document, String tag, Type customType,
-      String extendsTagName) native "Utils_register";
+  static void _register(String tag, Type customType, Type nativeType) native "Utils_register";
 }
 
 class _NPObject extends NativeFieldWrapperClass1 {