Fix bug in html element remove.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 383a8e44c168099e978f749a8066e39fe0f2277e..ff1dcb34d9ce0cf2e20c2688918f96891e0195a2 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -8844,7 +8844,7 @@ class _ChildrenElementList implements List {
   void remove(Object object) {
     if (object is Element) {
       Element element = object;
-      if (identical(element.parentNode, this)) {
+      if (identical(element.parentNode, _element)) {
         _element.$dom_removeChild(element);
       }
     }
@@ -14726,7 +14726,7 @@ abstract class DateTimeInputElement implements RangeInputElementBase {
   factory DateTimeInputElement() => new InputElement(type: 'datetime');
 
   @DomName('HTMLInputElement.valueAsDate')
-  Date valueAsDate;
+  DateTime valueAsDate;
 
   @DomName('HTMLInputElement.readOnly')
   bool readOnly;
@@ -14751,7 +14751,7 @@ abstract class DateInputElement implements RangeInputElementBase {
   factory DateInputElement() => new InputElement(type: 'date');
 
   @DomName('HTMLInputElement.valueAsDate')
-  Date valueAsDate;
+  DateTime valueAsDate;
 
   @DomName('HTMLInputElement.readOnly')
   bool readOnly;
@@ -14776,7 +14776,7 @@ abstract class MonthInputElement implements RangeInputElementBase {
   factory MonthInputElement() => new InputElement(type: 'month');
 
   @DomName('HTMLInputElement.valueAsDate')
-  Date valueAsDate;
+  DateTime valueAsDate;
 
   @DomName('HTMLInputElement.readOnly')
   bool readOnly;
@@ -14801,7 +14801,7 @@ abstract class WeekInputElement implements RangeInputElementBase {
   factory WeekInputElement() => new InputElement(type: 'week');
 
   @DomName('HTMLInputElement.valueAsDate')
-  Date valueAsDate;
+  DateTime valueAsDate;
 
   @DomName('HTMLInputElement.readOnly')
   bool readOnly;
@@ -14826,7 +14826,7 @@ abstract class TimeInputElement implements RangeInputElementBase {
   factory TimeInputElement() => new InputElement(type: 'time');
 
   @DomName('HTMLInputElement.valueAsDate')
-  Date valueAsDate;
+  DateTime valueAsDate;
 
   @DomName('HTMLInputElement.readOnly')
   bool readOnly;