Get rid of old code for union/intersection in HType.

sdk/lib/_internal/compiler/implementation/closure.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 closureToClassMapper;
 
 import "elements/elements.dart";
 import "dart2jslib.dart";
 import "dart_types.dart";
 import "scanner/scannerlib.dart" show Token;
 import "tree/tree.dart";
 import "util/util.dart";
 import "elements/modelx.dart" show ElementX, FunctionElementX, ClassElementX;
 
 class ClosureNamer {
   SourceString getClosureVariableName(SourceString name, int id) {
-    return new SourceString("${name.slowToString()}_$id");    
+    return new SourceString("${name.slowToString()}_$id");
   }
 }
 
 
 class ClosureTask extends CompilerTask {
   Map<Node, ClosureClassMap> closureMappingCache;
   ClosureNamer namer;
   ClosureTask(Compiler compiler, this.namer)
       : closureMappingCache = new Map<Node, ClosureClassMap>(),
         super(compiler);
@@ skipping 662 matching lines @@
   }
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     bool oldInTryStatement = inTryStatement;
     inTryStatement = true;
     node.visitChildren(this);
     inTryStatement = oldInTryStatement;
   }
 }