Revert "Split TypedSelector into Selector and TypeMask."

pkg/compiler/lib/src/js_emitter/program_builder.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder.dart
index 4310c482ddc43a9bef4fc4c3c7feaaa5a48f1625..74295c876ef49184be50aab0b0b245534d21696e 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder.dart
@@ -26,7 +26,7 @@ import 'js_emitter.dart' show
 
 import '../elements/elements.dart' show ParameterElement, MethodElement;
 
-import '../universe/universe.dart' show Universe, TypeMaskSet;
+import '../universe/universe.dart' show Universe;
 import '../deferred_load.dart' show DeferredLoadTask, OutputUnit;
 
 part 'registry.dart';
@@ -336,8 +336,8 @@ class ProgramBuilder {
         if (method != null) methods.add(method);
       }
       if (member.isGetter || member.isField) {
-        Map<Selector, TypeMaskSet> selectors =
-            _compiler.codegenWorld.invocationsByName(member.name);
+        Set<Selector> selectors =
+            _compiler.codegenWorld.invokedNames[member.name];
         if (selectors != null && !selectors.isEmpty) {
 
           Map<String, js.Expression> callStubsForMember =