Remove element from DynamicType.

sdk/lib/_internal/compiler/implementation/constants.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 dart2js;
 
 abstract class ConstantVisitor<R> {
   const ConstantVisitor();
 
   R visitFunction(FunctionConstant constant);
@@ skipping 526 matching lines @@
     return other is InterceptorConstant
         && dispatchedType == other.dispatchedType;
   }
 
   int get hashCode => dispatchedType.hashCode * 43;
 
   List<Constant> getDependencies() => const <Constant>[];
 
   accept(ConstantVisitor visitor) => visitor.visitInterceptor(this);
 
-  DartType computeType(Compiler compiler) => compiler.types.dynamicType;
+  DartType computeType(Compiler compiler) => const DynamicType();
 
   ti.TypeMask computeMask(Compiler compiler) {
     return compiler.typesTask.nonNullType;
   }
 
   String toString() {
     return 'InterceptorConstant(${dispatchedType.getStringAsDeclared("o")})';
   }
 }
 
 class DummyConstant extends Constant {
   final ti.TypeMask typeMask;
 
   DummyConstant(this.typeMask);
 
   bool get isDummy => true;
 
   bool operator ==(other) {
     return other is DummyConstant
         && typeMask == other.typeMask;
   }
 
   get hashCode => typeMask.hashCode;
 
   List<Constant> getDependencies() => const <Constant>[];
 
   accept(ConstantVisitor visitor) => visitor.visitDummy(this);
 
-  DartType computeType(Compiler compiler) => compiler.types.dynamicType;
+  DartType computeType(Compiler compiler) => const DynamicType();
 
   ti.TypeMask computeMask(Compiler compiler) => typeMask;
 
   String toString() {
     return 'DummyConstant($typeMask)';
   }
 }
 
 class ConstructedConstant extends ObjectConstant {
   final List<Constant> fields;
@@ skipping 94 matching lines @@
   DartType computeType(Compiler compiler) => referenced.computeType(compiler);
 
   ti.TypeMask computeMask(Compiler compiler) {
     return referenced.computeMask(compiler);
   }
 
   String toString() {
     return 'DeferredConstant($referenced)';
   }
 }