Remove support for 'argument definitions test' from dart2js.

sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.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 js_backend;
 
 class ConstantEmitter  {
   ConstantReferenceEmitter _referenceEmitter;
   ConstantInitializerEmitter _initializerEmitter;
 
@@ skipping 43 matching lines @@
   }
 
   jsAst.Expression generateInInitializationContext(Constant constant) {
     return _visit(constant);
   }
 
   jsAst.Expression _visit(Constant constant) {
     return constant.accept(this);
   }
 
-  jsAst.Expression visitSentinel(SentinelConstant constant) {
-    return new jsAst.VariableUse(namer.CURRENT_ISOLATE);
-  }
-
   jsAst.Expression visitFunction(FunctionConstant constant) {
     return new jsAst.VariableUse(
         namer.isolateStaticClosureAccess(constant.element));
   }
 
   jsAst.Expression visitNull(NullConstant constant) {
     return new jsAst.LiteralNull();
   }
 
   jsAst.Expression visitInt(IntConstant constant) {
@@ skipping 88 matching lines @@
   }
 
   jsAst.Expression _visit(Constant constant) {
     return constant.accept(this);
   }
 
   jsAst.Expression _reference(Constant constant) {
     return referenceEmitter.generateInInitializationContext(constant);
   }
 
-  jsAst.Expression visitSentinel(SentinelConstant constant) {
-    compiler.internalError(
-        "The parameter sentinel constant does not need specific JS code");
-  }
-
   jsAst.Expression visitFunction(FunctionConstant constant) {
     compiler.internalError(
         "The function constant does not need specific JS code");
   }
 
   jsAst.Expression visitNull(NullConstant constant) {
     return _reference(constant);
   }
 
   jsAst.Expression visitInt(IntConstant constant) {
@@ skipping 142 matching lines @@
           .toList(growable: false)
           .map((DartType type) => rti.getTypeRepresentation(type, (_){}));
       jsAst.Expression argumentList =
           new jsAst.LiteralString('[${arguments.join(', ')}]');
       return new jsAst.Call(getHelperProperty(backend.getSetRuntimeTypeInfo()),
                             [value, argumentList]);
     }
     return value;
   }
 }