Finish strong mode cleaning of dart2js.

pkg/compiler/lib/src/js_backend/mirrors_data.dart

 // Copyright (c) 2017, 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.
 
 import '../closure.dart';
 import '../common.dart';
 import '../common_elements.dart';
 import '../compiler.dart';
 import '../constants/values.dart';
 import '../elements/elements.dart';
@@ skipping 354 matching lines @@
         } else if (target.isTypedef) {
           _typedefsInMirrorsUsedTargets.add(target);
         } else if (target.isLibrary) {
           librariesInMirrorsUsedTargets.add(target as LibraryEntity);
         } else if (target != null) {
           membersInMirrorsUsedTargets.add(target as MemberEntity);
         }
       }
     }
     if (metaTargets != null) {
-      for (var element in metaTargets) {
+      for (dynamic element in metaTargets) {
         if (element is ClassEntity) {
           metaTargetsUsed.add(element);
         }
       }
     }
   }
 
   @override
   bool isClassAccessibleByReflection(ClassEntity element) {
     return _classesNeededForReflection.contains(_getDartClass(element));
@@ skipping 176 matching lines @@
     bool foundClosure = false;
     for (ClassElement cls in worldBuilder.directlyInstantiatedClasses) {
       // Do not process internal classes.
       if (cls.library.isInternalLibrary || cls.isInjected) continue;
       if (isClassReferencedFromMirrorSystem(cls)) {
         Set<Name> memberNames = new Set<Name>();
         // 1) the class (should be resolved)
         assert(cls.isResolved, failedAt(cls));
         _classesNeededForReflection.add(cls);
         // 2) its constructors (if resolved)
-        cls.constructors.forEach((ConstructorElement constructor) {
+        cls.constructors.forEach((Element _constructor) {
+          ConstructorElement constructor = _constructor;
           if (worldBuilder.isMemberUsed(constructor)) {
             _membersNeededForReflection.add(constructor);
           }
         });
         // 3) all members, including fields via getter/setters (if resolved)
         cls.forEachClassMember((Member member) {
           MemberElement element = member.element;
           if (worldBuilder.isMemberUsed(element)) {
             memberNames.add(member.name);
             _membersNeededForReflection.add(element);
-            element.nestedClosures
-                .forEach((SynthesizedCallMethodElementX callFunction) {
+            element.nestedClosures.forEach((FunctionElement _callFunction) {
+              SynthesizedCallMethodElementX callFunction = _callFunction;
               _membersNeededForReflection.add(callFunction);
               _classesNeededForReflection.add(callFunction.closureClass);
             });
           }
         });
         // 4) all overriding members of subclasses/subtypes (should be resolved)
         if (closedWorld.hasAnyStrictSubtype(cls)) {
-          closedWorld.forEachStrictSubtypeOf(cls, (ClassElement subcls) {
+          closedWorld.forEachStrictSubtypeOf(cls, (ClassEntity _subcls) {
+            ClassElement subcls = _subcls;
             subcls.forEachClassMember((Member member) {
               if (memberNames.contains(member.name)) {
                 // TODO(20993): find out why this assertion fails.
                 // assert(worldBuilder.isMemberUsed(member.element),
                 //     failedAt(member.element));
                 if (worldBuilder.isMemberUsed(member.element)) {
                   _membersNeededForReflection.add(member.element);
                 }
               }
             });
           });
         }
         // 5) all its closures
         List<LocalFunctionElement> closures = closureMap[cls];
         if (closures != null) {
           _closuresNeededForReflection.addAll(closures);
           foundClosure = true;
         }
       } else {
         // check members themselves
-        cls.constructors.forEach((ConstructorElement element) {
+        cls.constructors.forEach((Element _element) {
+          ConstructorElement element = _element;
           if (!worldBuilder.isMemberUsed(element)) return;
           if (_memberReferencedFromMirrorSystem(element)) {
             _membersNeededForReflection.add(element);
           }
         });
         cls.forEachClassMember((Member member) {
           if (!worldBuilder.isMemberUsed(member.element)) return;
           if (_memberReferencedFromMirrorSystem(member.element)) {
             _membersNeededForReflection.add(member.element);
           }
@@ skipping 77 matching lines @@
   }
 
   /// Called when `const Symbol(name)` is seen.
   void registerConstSymbol(String name) {
     symbolsUsed.add(name);
     if (name.endsWith('=')) {
       symbolsUsed.add(name.substring(0, name.length - 1));
     }
   }
 }