Make sure the SSA codegen visit constants used in a switch through the 'visitConstant' method, to e…

sdk/lib/_internal/compiler/implementation/ssa/nodes.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.
 
 part of ssa;
 
 abstract class HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
@@ skipping 2794 matching lines @@
       finallyBlock == null ? catchBlock.end : finallyBlock.end;
 
   bool accept(HStatementInformationVisitor visitor) =>
     visitor.visitTryInfo(this);
 }
 
 
 
 class HSwitchBlockInformation implements HStatementInformation {
   final HExpressionInformation expression;
-  final List<List<Constant>> matchExpressions;
   final List<HStatementInformation> statements;
   final TargetElement target;
   final List<LabelElement> labels;
 
   HSwitchBlockInformation(this.expression,
-                          this.matchExpressions,
                           this.statements,
                           this.target,
                           this.labels);
 
   HBasicBlock get start => expression.start;
   HBasicBlock get end {
     // We don't create a switch block if there are no cases.
     assert(!statements.isEmpty);
     return statements.last.end;
   }
 
   bool accept(HStatementInformationVisitor visitor) =>
       visitor.visitSwitchInfo(this);
 }