Revert "Dartium w/ JsInterop enabled"

tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate

Index: tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate b/tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate
index bf8f0ffc2c5ef6293eeff7f52d9889876db75987..3d9e6afb5cedefa436b006eb0483131cdaea4545 100644
--- a/tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate
+++ b/tools/dom/templates/html/impl/impl_HTMLDocument.darttemplate
@@ -17,7 +17,7 @@ $else
   BodyElement get body => _body;
 
   @DomName('Document.body')
-  set body(BodyElement value) {
+  void set body(BodyElement value) {
     _body = value;
   }
 $endif
@@ -90,7 +90,7 @@ $endif
 
   @DomName('Document.selectedStylesheetSet')
   String get selectedStylesheetSet => _selectedStylesheetSet;
-  set selectedStylesheetSet(String value) {
+  void set selectedStylesheetSet(String value) {
     _selectedStylesheetSet = value;
   }
 
@@ -101,7 +101,7 @@ $endif
   String get title => _title;
 
   @DomName('Document.title')
-  set title(String value) {
+  void set title(String value) {
     _title = value;
   }
 
@@ -187,41 +187,6 @@ $if DART2JS
 $else
   String get visibilityState => _webkitVisibilityState;
 $endif
-$if DARTIUM
-
-  /**
-   * Internal routine to find the DOM JS class name being extended for custom
-   * elements.
-   */
-  String _getJSClassName(ClassMirror classMirror) {
-    var jsClassName = null;
-    var isElement = false;
-
-    while (classMirror.superclass != null) {
-      var fullName = classMirror.superclass.qualifiedName;
-      isElement = isElement || (fullName == #dart.dom.html.Element);
-
-      var domLibrary = MirrorSystem.getName(fullName).startsWith('dart.dom.');
-      if (jsClassName == null && domLibrary) {
-        // Lookup JS class name (if not found).
-        var metadatas = classMirror.metadata;
-        for (var metadata in metadatas) {
-          var metaDataMirror = metadata.reflectee;
-          var metaType = reflectClass(metaDataMirror.runtimeType);
-          if (MirrorSystem.getName(metaType.simpleName) == 'DomName' &&
-              metaDataMirror.name.startsWith('HTML')) {
-            jsClassName = metadata.reflectee.name;
-          }
-        }
-      }
-
-      classMirror = classMirror.superclass;
-    }
-
-    // If we're an element then everything is okay.
-    return isElement ? jsClassName : null;
-  }
-$endif
 
   @Experimental()
   /**
@@ -271,73 +236,7 @@ $if DART2JS
     _registerCustomElement(JS('', 'window'), this, tag, customElementClass,
         extendsTag);
 $else
-    // TODO(terry): Need to handle the extendsTag.
-
-    // Figure out which DOM class is being extended from the user's Dart class.
-    var classMirror = reflectClass(customElementClass);
-    var jsClassName = _getJSClassName(classMirror);
-    if (jsClassName == null) {
-      // Only components derived from HTML* can be extended.
-      throw new DomException.jsInterop("HierarchyRequestError: Only HTML elements can be customized.");
-    }
-
-    // Start the hookup the JS way create an <x-foo> element that extends the
-    // <x-base> custom element. Inherit its prototype and signal what tag is
-    // inherited:
-    //
-    //     var myProto = Object.create(HTMLElement.prototype);
-    //     var myElement = document.registerElement('x-foo', {prototype: myProto});
-    var baseElement = js.context[jsClassName];
-    if (baseElement == null) {
-      // Couldn't find the HTML element so use a generic one.
-      baseElement = js.context['HTMLElement'];
-    }
-    var elemProto = js.context['Object'].callMethod("create", [baseElement['prototype']]);
-
-    // TODO(terry): Hack to stop recursion re-creating custom element when the
-    //              created() constructor of the custom element does e.g.,
-    //
-    //                  MyElement.created() : super.created() {
-    //                    this.innerHtml = "<b>I'm an x-foo-with-markup!</b>";
-    //                  }
-    //
-    //              sanitizing causes custom element to created recursively
-    //              until stack overflow.
-    //
-    //              See https://github.com/dart-lang/sdk/issues/23666
-    int creating = 0;
-    elemProto['createdCallback'] = new js.JsFunction.withThis(($this) {
-      if (_getJSClassName(reflectClass(customElementClass).superclass) != null && creating < 2) {
-        creating++;
-
-        var dartClass = _blink.Blink_Utils.constructElement(customElementClass, $this);
-
-        // Need to remember the Dart class that was created for this custom so
-        // return it and setup the blink_jsObject to the $this that we'll be working
-        // with as we talk to blink. 
-        $this['dart_class'] = dartClass;
-
-        creating--;
-      }
-    });
-    elemProto['attributeChangedCallback'] = new js.JsFunction.withThis(($this, attrName, oldVal, newVal) {
-      if ($this["dart_class"] != null && $this['dart_class'].attributeChanged != null) {
-        $this['dart_class'].attributeChanged(attrName, oldVal, newVal);
-      }
-    });
-    elemProto['attachedCallback'] = new js.JsFunction.withThis(($this) {
-      if ($this["dart_class"] != null && $this['dart_class'].attached != null) {
-        $this['dart_class'].attached();
-      }
-    });
-    elemProto['detachedCallback'] = new js.JsFunction.withThis(($this) {
-      if ($this["dart_class"] != null && $this['dart_class'].detached != null) {
-        $this['dart_class'].detached();
-      }
-    });
-    // document.registerElement('x-foo', {prototype: elemProto, extends: extendsTag});
-    var jsMap = new js.JsObject.jsify({'prototype': elemProto, 'extends': extendsTag});
-    js.context['document'].callMethod('registerElement', [tag, jsMap]);
+    _Utils.register(this, tag, customElementClass, extendsTag);
 $endif
   }