Revert "Split TypedSelector into Selector and TypeMask."

pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart

 // Copyright (c) 2014, 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 tree_ir_builder;
 
 import '../dart2jslib.dart' as dart2js;
 import '../elements/elements.dart';
 import '../cps_ir/cps_ir_nodes.dart' as cps_ir;
 import '../util/util.dart' show CURRENT_ELEMENT_SPANNABLE;
@@ skipping 333 matching lines @@
     // Calls are translated to direct style.
     List<Expression> arguments = translateArguments(node.arguments);
     Expression invoke = new InvokeStatic(node.target, node.selector, arguments,
         sourceInformation: node.sourceInformation);
     return continueWithExpression(node.continuation, invoke);
   }
 
   Statement visitInvokeMethod(cps_ir.InvokeMethod node) {
     InvokeMethod invoke = new InvokeMethod(getVariableUse(node.receiver),
                                            node.selector,
-                                           node.mask,
                                            translateArguments(node.arguments));
     invoke.receiverIsNotNull = node.receiverIsNotNull;
     return continueWithExpression(node.continuation, invoke);
   }
 
   Statement visitInvokeMethodDirectly(cps_ir.InvokeMethodDirectly node) {
     Expression receiver = getVariableUse(node.receiver);
     List<Expression> arguments = translateArguments(node.arguments);
     Expression invoke = new InvokeMethodDirectly(receiver, node.target,
         node.selector, arguments);
@@ skipping 222 matching lines @@
 
   Expression visitApplyBuiltinOperator(cps_ir.ApplyBuiltinOperator node) {
     if (node.operator == BuiltinOperator.IsFalsy) {
       return new Not(getVariableUse(node.arguments.single));
     }
     return new ApplyBuiltinOperator(node.operator,
                                     translateArguments(node.arguments));
   }
 }