All strong mode cleaning of dart2js.

pkg/compiler/lib/src/js_emitter/type_test_registry.dart

Index: pkg/compiler/lib/src/js_emitter/type_test_registry.dart
diff --git a/pkg/compiler/lib/src/js_emitter/type_test_registry.dart b/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
index 1cf8e1d51dbe91dd8d0cc6270433e01e8d6b5349..ffa540bc572d5d6e94ad37958a184c8054d31ae9 100644
--- a/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
+++ b/pkg/compiler/lib/src/js_emitter/type_test_registry.dart
@@ -8,6 +8,7 @@ import '../common.dart';
 import '../common_elements.dart';
 import '../elements/elements.dart' show ClassElement, MethodElement;
 import '../elements/entities.dart';
+import '../elements/types.dart' show DartType;
 import '../elements/resolution_types.dart'
     show
         ResolutionDartType,
@@ -51,9 +52,11 @@ class TypeTestRegistry {
   Iterable<ClassElement> get classesUsingTypeVariableTests {
     if (cachedClassesUsingTypeVariableTests == null) {
       cachedClassesUsingTypeVariableTests = _codegenWorldBuilder.isChecks
-          .where((ResolutionDartType t) => t is ResolutionTypeVariableType)
-          .map((ResolutionTypeVariableType v) => v.element.enclosingClass)
-          .toList();
+          .where((DartType t) => t is ResolutionTypeVariableType)
+          .map((DartType _v) {
+        ResolutionTypeVariableType v = _v;
+        return v.element.enclosingClass;
+      }).toList();
     }
     return cachedClassesUsingTypeVariableTests;
   }
@@ -121,7 +124,9 @@ class TypeTestRegistry {
     //     argument checks.
     // TODO(karlklose): merge this case with 2 when unifying argument and
     // object checks.
-    rtiChecks.getRequiredArgumentClasses().forEach(addClassWithSuperclasses);
+    rtiChecks
+        .getRequiredArgumentClasses()
+        .forEach((e) => addClassWithSuperclasses(e));
 
     // 2.  Add classes that are referenced by substitutions in object checks and
     //     their superclasses.