Infer types for parameters even in the presence of InvocationMirror.delegate.

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked;
 
   JavaScriptItemCompilationContext()
@@ skipping 406 matching lines @@
     if (element.isParameter()
         || element.isFieldParameter()
         || element.isField()) {
       if (usedByBackend(element.enclosingElement)) return true;
     }
     return helpersUsed.contains(element.declaration);
   }
 
   bool invokedReflectively(Element element) {
     if (element.isParameter() || element.isFieldParameter()) {
-      if (hasInsufficientMirrorsUsed && compiler.enabledInvokeOn) return true;
       if (invokedReflectively(element.enclosingElement)) return true;
     }
 
     if (element.isField()) {
       if (Elements.isStaticOrTopLevel(element)
           && (element.modifiers.isFinal() || element.modifiers.isConst())) {
         return false;
       }
-      if (hasInsufficientMirrorsUsed && compiler.enabledInvokeOn) return true;
     }
 
     return isNeededForReflection(element.declaration);
   }
 
   bool canBeUsedForGlobalOptimizations(Element element) {
     return !usedByBackend(element) && !invokedReflectively(element);
   }
 
   bool isInterceptorClass(ClassElement element) {
@@ skipping 1423 matching lines @@
     copy(constant.values);
     copy(constant.protoValue);
     copy(constant);
   }
 
   void visitConstructed(ConstructedConstant constant) {
     copy(constant.fields);
     copy(constant);
   }
 }