Substitution handled for most Send nodes.

lib/compiler/implementation/tree/nodes.dart

Index: lib/compiler/implementation/tree/nodes.dart
diff --git a/lib/compiler/implementation/tree/nodes.dart b/lib/compiler/implementation/tree/nodes.dart
index 1e356539a9434db3c0ed19a13c0affec3fb8bd34..f9221992684a4cc7c0982c2c1cef82edf0825849 100644
--- a/lib/compiler/implementation/tree/nodes.dart
+++ b/lib/compiler/implementation/tree/nodes.dart
@@ -385,6 +385,25 @@ class NewExpression extends Expression {
   Token getBeginToken() => newToken;
 
   Token getEndToken() => send.getEndToken();
+
+  /**
+   * Returns the type annotation of this new expression. The type annotation
+   * is either the `send.selector` for invocations of unnamed constructors like
+   * `new Class()`, or `send.selector.receiver` for named constructors like
+   * `new Class.named()`.
+   */
+  TypeAnnotation getTypeAnnotation() {
+    if (send.selector.asTypeAnnotation() !== null) {
+      return send.selector;
+    } else if (send.selector.asSend() !== null) {
+      Send selector = send.selector;
+      if (selector.receiver.asTypeAnnotation() !== null) {
+        return selector.receiver;
+      }
+    } else {
+      return null;
+    }
+  }
 }
 
 class NodeList extends Node implements Iterable<Node> {