Support type literals as compile-time constants.

sdk/lib/_internal/compiler/implementation/universe/universe.dart

Index: sdk/lib/_internal/compiler/implementation/universe/universe.dart
diff --git a/sdk/lib/_internal/compiler/implementation/universe/universe.dart b/sdk/lib/_internal/compiler/implementation/universe/universe.dart
index ced6600055c5b0ad88cd96bbaf2dd87207e88639..11303c2713d390d09899e6c223e3f2486d7aa2da 100644
--- a/sdk/lib/_internal/compiler/implementation/universe/universe.dart
+++ b/sdk/lib/_internal/compiler/implementation/universe/universe.dart
@@ -49,7 +49,8 @@ class Universe {
   final Map<SourceString, Set<Selector>> fieldGetters;
   final Map<SourceString, Set<Selector>> fieldSetters;
   final Set<DartType> isChecks;
-  final RuntimeTypeInformation rti;
+  /// Runtime type information support. This field is only set in the backend.
+  RuntimeTypeInformation rti;
 
   Universe() : generatedCode = new Map<Element, CodeBuffer>(),
                generatedBailoutCode = new Map<Element, CodeBuffer>(),
@@ -60,8 +61,7 @@ class Universe {
                invokedSetters = new Map<SourceString, Set<Selector>>(),
                fieldGetters = new Map<SourceString, Set<Selector>>(),
                fieldSetters = new Map<SourceString, Set<Selector>>(),
-               isChecks = new Set<DartType>(),
-               rti = new RuntimeTypeInformation();
+               isChecks = new Set<DartType>();
 
   void addGeneratedCode(WorkItem work, CodeBuffer codeBuffer) {
     assert(invariant(work.element, work.element.isDeclaration));