First batch of changes to make analyzer package strong mode error free

pkg/analyzer/lib/dart/ast/ast.dart

Index: pkg/analyzer/lib/dart/ast/ast.dart
diff --git a/pkg/analyzer/lib/dart/ast/ast.dart b/pkg/analyzer/lib/dart/ast/ast.dart
index d0680c4b0959192b695f3baaba1b64c9c7b30a84..2600c3fae9c637601f29cbe9efd72849c016c8f7 100644
--- a/pkg/analyzer/lib/dart/ast/ast.dart
+++ b/pkg/analyzer/lib/dart/ast/ast.dart
@@ -536,7 +536,7 @@ abstract class AstNode {
    * (either AST nodes or tokens) that make up the contents of this node,
    * including doc comments but excluding other comments.
    */
-  Iterable/*<AstNode | Token>*/ get childEntities;
+  Iterable /* AstNode | Token */ get childEntities;
 
   /**
    * Return the offset of the character immediately following the last character
@@ -5899,7 +5899,8 @@ abstract class NodeList<E extends AstNode> implements List<E> {
    * are added to the list will have their parent set to the given [owner]. The
    * list will initially be populated with the given [elements].
    */
-  factory NodeList(AstNode owner, [List<E> elements]) = NodeListImpl;
+  factory NodeList(AstNode owner, [List<E> elements]) =>
+      new NodeListImpl<E>(owner as AstNodeImpl, elements);
 
   /**
    * Return the first token included in this node list's source range, or `null`