Expose getter and setter invocations by name, in dart2js 'World'.

pkg/compiler/lib/src/universe/universe.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 universe;
 
+import 'dart:collection';
+
 import '../elements/elements.dart';
 import '../dart2jslib.dart';
 import '../dart_types.dart';
 import '../types/types.dart';
 import '../tree/tree.dart';
 import '../util/util.dart';
 
 part 'function_set.dart';
 part 'side_effects.dart';
 
@@ skipping 253 matching lines @@
     Selector selector = universeSelector.selector;
     String name = selector.name;
     TypeMask mask = universeSelector.mask;
     Map<Selector, TypeMaskSet> selectors = selectorMap.putIfAbsent(
         name, () => new Maplet<Selector, TypeMaskSet>());
     IncreasingTypeMaskSet masks = selectors.putIfAbsent(
         selector, () => new IncreasingTypeMaskSet());
     return masks.add(mask);
   }
 
+  Map<Selector, TypeMaskSet> _asUnmodifiable(Map<Selector, TypeMaskSet> map) {
+    if (map == null) return null;
+    return new UnmodifiableMapView(map);
+  }
+
   Map<Selector, TypeMaskSet> invocationsByName(String name) {
-    return _invokedNames[name];
+    return _asUnmodifiable(_invokedNames[name]);
+  }
+
+  Map<Selector, TypeMaskSet> getterInvocationsByName(String name) {
+    return _asUnmodifiable(_invokedGetters[name]);
+  }
+
+  Map<Selector, TypeMaskSet> setterInvocationsByName(String name) {
+    return _asUnmodifiable(_invokedSetters[name]);
   }
 
   void forEachInvokedName(
       f(String name, Map<Selector, TypeMaskSet> selectors)) {
     _invokedNames.forEach(f);
   }
 
   void forEachInvokedGetter(
       f(String name, Map<Selector, TypeMaskSet> selectors)) {
     _invokedGetters.forEach(f);
@@ skipping 594 matching lines @@
     // Add bits from the call structure.
     return Hashing.mixHashCodeBits(hash, callStructure.hashCode);
   }
 
   String toString() {
     return 'Selector($kind, $name, ${callStructure.structureToString()})';
   }
 
   Selector toCallSelector() => new Selector.callClosureFrom(this);
 }