fix(component): revert regression of injecting Element/Node into Component

Author: mhevery

lib/core_dom/event_handler.dart

@@ -100,3 +100,11 @@ class EventHandler {
     return part.replaceAll("-", "");
   }
 }
+
+@NgInjectableService()
+class _ShadowRootEventHandler extends EventHandler {
+  _ShadowRootEventHandler(dom.ShadowRoot shadowRoot,
+                         Expando expando,
+                         ExceptionHandler exceptionHandler)
+      : super(shadowRoot, expando, exceptionHandler);
+}

lib/core_dom/view_factory.dart

@@ -231,12 +231,10 @@ class _ComponentFactory implements Function {
     var shadowModule = new Module()
         ..type(type)
         ..type(NgElement)
-        ..type(EventHandler)
+        ..type(EventHandler, implementedBy: _ShadowRootEventHandler)
         ..value(Scope, shadowScope)
         ..value(TemplateLoader, templateLoader)
         ..value(dom.ShadowRoot, shadowDom)
-        ..value(dom.Element, null)
-        ..value(dom.Node, shadowDom)
         ..factory(ElementProbe, (_) => probe);
     shadowInjector = injector.createChild([shadowModule], name: _SHADOW);
     probe = _expando[shadowDom] = new ElementProbe(

test/core_dom/compiler_spec.dart

@@ -217,6 +217,7 @@ void main() {
           ..type(SimpleAttachComponent)
           ..type(SimpleComponent)
           ..type(ExprAttrComponent)
+          ..type(LogElementComponent)
           ..type(SayHelloFilter);
       });
 
@@ -521,6 +522,13 @@ void main() {
 
           expect(logger).toEqual(['SimpleAttachComponent']);
         }));
+
+        it('should inject compenent element as the dom.Element', async((Logger log, TestBed _, MockHttpBackend backend) {
+          backend.whenGET('foo.html').respond('<div>WORKED</div>');
+          _.compile('<log-element></log-element>');
+          Element element = _.rootElement;
+          expect(log).toEqual([element, element, element.shadowRoot]);
+        }));
       });
 
       describe('invalid components', () {
@@ -941,3 +949,15 @@ class SimpleAttachComponent implements NgAttachAware, NgShadowRootAware {
   attach() => logger('attach');
   onShadowRoot(_) => logger('onShadowRoot');
 }
+
+@NgComponent(
+    selector: 'log-element',
+    templateUrl: 'foo.html')
+class LogElementComponent{
+  LogElementComponent(Logger logger, Element element, Node node,
+                        ShadowRoot shadowRoot) {
+    logger(element);
+    logger(node);
+    logger(shadowRoot);
+  }
+}