Revert "Split TypedSelector into Selector and TypeMask."

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

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index 0e7f886e1fc01d176db999cf028411bee2f2da84..78ccd5829e5cb30eaef2996fc59e5e308f9eba5c 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -15,8 +15,6 @@ import '../../util/maplet.dart';
 import '../../constants/values.dart';
 import '../../dart2jslib.dart';
 import '../../dart_types.dart';
-import '../../types/types.dart' show TypeMask;
-import '../../universe/universe.dart' show UniverseSelector;
 import '../../closure.dart' show ClosureClassElement;
 
 class CodegenBailout {
@@ -255,11 +253,10 @@ class CodeGenerator extends tree_ir.StatementVisitor
 
   void registerMethodInvoke(tree_ir.InvokeMethod node) {
     Selector selector = node.selector;
-    TypeMask mask = node.mask;
     if (selector.isGetter) {
-      registry.registerDynamicGetter(new UniverseSelector(selector, mask));
+      registry.registerDynamicGetter(selector);
     } else if (selector.isSetter) {
-      registry.registerDynamicSetter(new UniverseSelector(selector, mask));
+      registry.registerDynamicSetter(selector);
     } else {
       assert(invariant(CURRENT_ELEMENT_SPANNABLE,
           selector.isCall || selector.isOperator ||
@@ -267,8 +264,8 @@ class CodeGenerator extends tree_ir.StatementVisitor
           message: 'unexpected kind ${selector.kind}'));
       // TODO(sigurdm): We should find a better place to register the call.
       Selector call = new Selector.callClosureFrom(selector);
-      registry.registerDynamicInvocation(new UniverseSelector(call, null));
-      registry.registerDynamicInvocation(new UniverseSelector(selector, mask));
+      registry.registerDynamicInvocation(call);
+      registry.registerDynamicInvocation(selector);
     }
   }