Use UnmodifiableMapView in compiler

sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirrors.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.
 
 library dart2js.mirrors;
 
-import 'dart:collection' show UnmodifiableListView;
+import 'dart:collection' show UnmodifiableListView, UnmodifiableMapView;
 
 import '../elements/elements.dart';
 import '../scanner/scannerlib.dart';
 import '../resolution/resolution.dart' show Scope;
 import '../dart2jslib.dart';
 import '../dart_types.dart';
 import '../tree/tree.dart';
 import '../util/util.dart'
     show Spannable,
          Link,
@@ skipping 278 matching lines @@
       compiler.libraries.forEach((_, LibraryElement v) {
         var mirror = new Dart2JsLibraryMirror(mirrorSystem, v);
         _libraries[mirror.uri] = mirror;
         _libraryMap[v] = mirror;
       });
     }
   }
 
   Map<Uri, LibraryMirror> get libraries {
     _ensureLibraries();
     return new FilteredImmutableMap<Uri, LibraryMirror>(_libraries,

[herhut, 2014/04/28 08:24:41]

Can we get rid of this, too, and base it on something from the core library?
Seems to be the last reference to the util classes.

[kevmoo, 2014/04/28 09:23:01]

Done.

         (library) => const bool.fromEnvironment("list_all_libraries") ||
                      !library._element.isInternalLibrary);
   }
 
   Dart2JsLibraryMirror _getLibrary(LibraryElement element) =>
       _libraryMap[element];
 
   Dart2JsMirrorSystem get mirrorSystem => this;
 
   TypeMirror get dynamicType =>
@@ skipping 61 matching lines @@
   }
 
   Element get _element;
 
   void _forEachElement(f(Element element));
 
   Iterable<Dart2JsMemberMirror> _getDeclarationMirrors(Element element);
 
   Map<Symbol, DeclarationMirror> get declarations {
     _ensureDeclarations();
-    return new ImmutableMapWrapper<Symbol, DeclarationMirror>(_declarations);
+    return new UnmodifiableMapView<Symbol, DeclarationMirror>(_declarations);
   }
 }
 
 /**
  * Converts [element] into its corresponding [DeclarationMirror], if any.
  *
  * If [element] is an [AbstractFieldElement] the mirror for its getter is
  * returned or, if not present, the mirror for its setter.
  */
 DeclarationMirror _convertElementToDeclarationMirror(Dart2JsMirrorSystem system,
@@ skipping 59 matching lines @@
  *
  * All API in this class is experimental.
  */
 class BackDoor {
   /// Return the compilation units comprising [library].
   static List<Mirror> compilationUnitsOf(Dart2JsLibraryMirror library) {
     return library._element.compilationUnits.toList().map(
         (cu) => new Dart2JsCompilationUnitMirror(cu, library)).toList();
   }
 }