Do not do global optimizations on fields and parameters when invokeOn is enabled.

sdk/lib/_internal/compiler/implementation/js_backend/emitter_no_eval.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 CodeEmitterNoEvalTask extends CodeEmitterTask {
   CodeEmitterNoEvalTask(Compiler compiler,
                         Namer namer,
                         bool generateSourceMap)
@@ skipping 16 matching lines @@
 
   void emitClosureClassHeader(String mangledName,
                               String superName,
                               List<String> fieldNames,
                               ClassBuilder builder) {
     builder.addProperty('', buildConstructor(mangledName, fieldNames));
     emitSuper(superName, builder);
   }
 
 
-  bool emitFields(ClassElement classElement,
+  bool emitFields(Element element,
                   ClassBuilder builder,
                   String superName,
                   { bool classIsNative: false,
                     bool emitStatics: false,
                     bool onlyForRti: false }) {
-    // Class fields are dynamically generated so they have to be
+    // Class and library fields are dynamically generated so they have to be
     // emitted using getters and setters instead.
     return false;
   }
 
   void emitClassConstructor(ClassElement classElement, ClassBuilder builder) {
     // Say we have a class A with fields b, c and d, where c needs a getter and
     // d needs both a getter and a setter. Then we produce:
     // - a constructor (directly into the given [buffer]):
     //   function A(b, c, d) { this.b = b, this.c = c, this.d = d; }
     // - getters and setters (stored in the [explicitGettersSetters] list):
@@ skipping 94 matching lines @@
               new jsAst.VariableDeclaration('ForceEfficientMap'),
               js.fun([], [])),
             js('ForceEfficientMap.prototype = this'),
             js('new ForceEfficientMap()')])),
       js('Isolate.prototype = oldIsolate.prototype'),
       js('Isolate.prototype.constructor = Isolate'),
       js('Isolate.${namer.isolatePropertiesName} = isolateProperties'),
       js.return_('Isolate')]);
   }
 }