Fix non-specific type parameter in member maps.

runtime/lib/mirrors_impl.dart

 // Copyright (c) 2012, 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.
 
 // VM-specific implementation of the dart:mirrors library.
 
 import "dart:collection";
 
 final emptyList = new UnmodifiableListView([]);
 final emptyMap = new _UnmodifiableMapView({});
@@ skipping 34 matching lines @@
   Map new_map = new Map<Symbol, dynamic>();
   old_map.forEach((key, value) {
     if (filter(key, value)) {
       new_map[key] = value;
     }
   });
   return new _UnmodifiableMapView(new_map);
 }
 
 Map _makeMemberMap(List mirrors) {
-  return new _UnmodifiableMapView(
-      new Map<Symbol, dynamic>.fromIterable(mirrors, key: (e) => e.simpleName));
+  return new _UnmodifiableMapView<Symbol, DeclarationMirror>(
+      new Map<Symbol, DeclarationMirror>.fromIterable(
+          mirrors, key: (e) => e.simpleName));
 }
 
 String _n(Symbol symbol) => _symbol_dev.Symbol.getName(symbol);
 
 Symbol _s(String name) {
   if (name == null) return null;
   return new _symbol_dev.Symbol.unvalidated(name);
 }
 
 Symbol _computeQualifiedName(DeclarationMirror owner, Symbol simpleName) {
@@ skipping 579 matching lines @@
     }
     return _cachedMethods;
   }
 
   Map<Symbol, MethodMirror> _cachedConstructors;
   Map<Symbol, MethodMirror> get _constructors {
     if (_cachedConstructors == null) {
       var constructorsList = _computeConstructors(_reflectee);
       var stringName = _n(simpleName);
       constructorsList.forEach((c) => c._patchConstructorName(stringName));
-      _cachedConstructors = _makeMemberMap(constructorsList);
+      _cachedConstructors =
+          new Map.fromIterable(constructorsList, key: (e) => e.simpleName);
     }
     return _cachedConstructors;
   }
 
   bool get _isAnonymousMixinApplication {
     if (_isMixinAlias) return false;  // Named mixin application.
     if (mixin == this) return false;  // Not a mixin application.
     return true;
   }
 
@@ skipping 823 matching lines @@
     if (typeMirror == null) {
       typeMirror = makeLocalTypeMirror(key);
       _instanitationCache[key] = typeMirror;
       if (typeMirror is ClassMirror && !typeMirror._isGeneric) {
         _declarationCache[key] = typeMirror;
       }
     }
     return typeMirror;
   }
 }