Add NativeEnqueuer to work with the Enqueuer.

sdk/lib/_internal/compiler/implementation/ssa/codegen.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;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 1754 matching lines @@
       }
       pushStatement(new js.LiteralStatement(code), node);
     } else {
       List<js.Expression> data = <js.Expression>[];
       for (int i = 0; i < inputs.length; i++) {
         use(inputs[i]);
         data.add(pop());
       }
       push(new js.LiteralExpression.withData(code, data), node);
     }
+    // TODO(sra): Tell world.nativeEnqueuer about the types created here.
   }
 
   visitForeignNew(HForeignNew node) {
     visitedForeignCode = true;
     String jsClassReference = backend.namer.isolateAccess(node.element);
     List<HInstruction> inputs = node.inputs;
     // We can't use 'visitArguments', since our arguments start at input[0].
     List<js.Expression> arguments = <js.Expression>[];
     for (int i = 0; i < inputs.length; i++) {
       use(inputs[i]);
@@ skipping 1316 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }