Fix type annotation for deferred constants.

pkg/compiler/lib/src/resolution/send_resolver.dart

Index: pkg/compiler/lib/src/resolution/send_resolver.dart
diff --git a/pkg/compiler/lib/src/resolution/send_resolver.dart b/pkg/compiler/lib/src/resolution/send_resolver.dart
index aa5a747db0f6ab531631e634b1954ea03d0d272b..fc02a31b7fa24944e4e7c595afba73776a5c3087 100644
--- a/pkg/compiler/lib/src/resolution/send_resolver.dart
+++ b/pkg/compiler/lib/src/resolution/send_resolver.dart
@@ -309,7 +309,10 @@ abstract class SendResolverMixin {
     Element getter = isCompound ? elements[node.selector] : null;
     if (elements.isTypeLiteral(node)) {
       DartType dartType = elements.getTypeLiteralType(node);
-      TypeConstantExpression constant = elements.getConstant(
+      // TODO(johnniwinther): Handle deferred constants. There are runtime
+      // but not compile-time constants and should have their own
+      // [DeferredConstantExpression] class.
+      ConstantExpression constant = elements.getConstant(
           isInvoke ? node.selector : node);
       switch (dartType.kind) {
         case TypeKind.INTERFACE: