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 b5f053bb405298f757074af33ecdd785be526ca9..a0cfe96536a34eae7ecfe309e5a386420c691155 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -5926,7 +5926,7 @@ class DataView extends ArrayBufferView native "*DataView" {
 
   @DomName('DataView.getInt8')
   @DocsEditable
-  Object getInt8({int byteOffset}) native;
+  int getInt8(int byteOffset) native;
 
   @DomName('DataView.getUint16')
   @DocsEditable
@@ -5938,7 +5938,7 @@ class DataView extends ArrayBufferView native "*DataView" {
 
   @DomName('DataView.getUint8')
   @DocsEditable
-  Object getUint8({int byteOffset}) native;
+  int getUint8(int byteOffset) native;
 
   @DomName('DataView.setFloat32')
   @DocsEditable
@@ -17096,9 +17096,10 @@ class _ChildNodeListLazy implements List {
 
   void addAll(Iterable<Node> iterable) {
     if (iterable is _ChildNodeListLazy) {
-      if (iterable._this != _this) {
+      if (!identical(iterable._this, _this)) {
         // Optimized route for copying between nodes.
         for (var i = 0, len = iterable.length; i < len; ++i) {
+          // Should use $dom_firstChild, Bug 8886.
           _this.$dom_appendChild(iterable[0]);
         }
       }
@@ -17318,6 +17319,31 @@ class Node extends EventTarget native "*Node" {
     return this;
   }
 
+  /**
+   * Inserts all of the nodes into this node directly before refChild.
+   *
+   * See also:
+   *
+   * * [insertBefore]
+   */
+  Node insertAllBefore(Iterable<Node> newNodes, Node refChild) {
+    if (newNodes is _ChildNodeListLazy) {
+      if (identical(newNodes._this, this)) {
+        throw new ArgumentError(newNodes);
+      }
+
+      // Optimized route for copying between nodes.
+      for (var i = 0, len = newNodes.length; i < len; ++i) {
+        // Should use $dom_firstChild, Bug 8886.
+        this.insertBefore(newNodes[0], refChild);
+      }
+    } else {
+      for (var node in newNodes) {
+        this.insertBefore(node, refChild);
+      }
+    }
+  }
+
 
   @JSName('childNodes')
   @DomName('Node.childNodes')