Revert r10075, I'll follow up with a different solution.

dart/lib/compiler/implementation/scanner/listener.dart

Index: dart/lib/compiler/implementation/scanner/listener.dart
diff --git a/dart/lib/compiler/implementation/scanner/listener.dart b/dart/lib/compiler/implementation/scanner/listener.dart
index ed75f5d1b500db58e87dc3d8c576186f07ce5d81..b2fe6befd1a7fb79bdca923c289bfc52aeab9c1f 100644
--- a/dart/lib/compiler/implementation/scanner/listener.dart
+++ b/dart/lib/compiler/implementation/scanner/listener.dart
@@ -1312,15 +1312,8 @@ class NodeListener extends ElementListener {
                          Token endToken) {
     NodeList elements = makeNodeList(count, beginToken, endToken, ',');
     NodeList typeArguments = popNode();
-    TypeAnnotation type = null;
-    if (typeArguments !== null) {
-      if (typeArguments.length() != 1) {
-        error('Type annotations for list literal should have a single type',
-              constKeyword.next);
-      }
-      type = typeArguments.iterator().next();
-    }
-    pushNode(new LiteralList(type, elements, constKeyword));
+    // TODO(ahe): Type arguments are discarded.
+    pushNode(new LiteralList(null, elements, constKeyword));
   }
 
   void handleIndexedExpression(Token openSquareBracket,