Add List.insert.

runtime/lib/byte_array.dart

Index: runtime/lib/byte_array.dart
diff --git a/runtime/lib/byte_array.dart b/runtime/lib/byte_array.dart
index 2323fdff747338746a5a18fead09ad6f88b9deaf..c2ce05d839c6722cd17810ac0738cd224f328ab2 100644
--- a/runtime/lib/byte_array.dart
+++ b/runtime/lib/byte_array.dart
@@ -2010,6 +2010,11 @@ class _ByteArrayViewBase extends Collection<int> {
         "Cannot remove from a non-extendable array");
   }
 
+  void insert(int index, int element) {
+    throw new UnsupportedError(
+        "Cannot add to a non-extendable array");
+  }
+
   int removeAt(int index) {
     throw new UnsupportedError(
         "Cannot remove from a non-extendable array");