Support typedef type literals

pkg/compiler/lib/src/js_backend/namer.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library js_backend.namer;
 
 import 'dart:collection' show HashMap;
 
 import 'package:js_runtime/shared/embedded_names.dart' show JsGetName;
 
@@ skipping 1917 matching lines @@
       if (failed) return;
       _visit(constant.fields[field]);
     });
   }
 
   @override
   void visitType(TypeConstantValue constant, [_]) {
     // Generates something like 'Type_String_k8F', using the simple name of the
     // type and a hash to disambiguate the same name in different libraries.
     addRoot('Type');
-    ResolutionDartType type = constant.representedType;
-    String name = type.element?.name;
+    DartType type = constant.representedType;
+    String name;
+    if (type is InterfaceType) {
+      name = type.element.name;
+    } else if (type is TypedefType) {
+      name = type.element.name;
+    }
     if (name == null) {
       // e.g. DartType 'dynamic' has no element.
       name = rtiEncoder.getTypeRepresentationForTypeConstant(type);
     }
     addIdentifier(name);
     add(getHashTag(constant, 3));
   }
 
   @override
   void visitInterceptor(InterceptorConstantValue constant, [_]) {
@@ skipping 102 matching lines @@
     int hash = _hashString(3, constant.type.element.name);
     codegenWorldBuilder.forEachInstanceField(constant.type.element,
         (_, FieldEntity field) {
       hash = _combine(hash, _visit(constant.fields[field]));
     });
     return hash;
   }
 
   @override
   int visitType(TypeConstantValue constant, [_]) {
-    ResolutionDartType type = constant.representedType;
+    DartType type = constant.representedType;
     // This name includes the library name and type parameters.
     String name = rtiEncoder.getTypeRepresentationForTypeConstant(type);
     return _hashString(4, name);
   }
 
   @override
   int visitInterceptor(InterceptorConstantValue constant, [_]) {
     String typeName = constant.cls.name;
     return _hashString(5, typeName);
   }
@@ skipping 166 matching lines @@
   void addSuggestion(String original, String suggestion) {
     assert(!_suggestedNames.containsKey(original));
     _suggestedNames[original] = suggestion;
   }
 
   bool hasSuggestion(String original) => _suggestedNames.containsKey(original);
   bool isSuggestion(String candidate) {
     return _suggestedNames.containsValue(candidate);
   }
 }