Use for-each in strong_mode.dart

pkg/analyzer/lib/src/task/strong_mode.dart

Index: pkg/analyzer/lib/src/task/strong_mode.dart
diff --git a/pkg/analyzer/lib/src/task/strong_mode.dart b/pkg/analyzer/lib/src/task/strong_mode.dart
index 37c91cf143290fa66cdbeea7165e29d2cb94e56d..09176840c4d82a0a04d1c4400c92a78ab9096432 100644
--- a/pkg/analyzer/lib/src/task/strong_mode.dart
+++ b/pkg/analyzer/lib/src/task/strong_mode.dart
@@ -88,14 +88,14 @@ class InstanceMemberInferrer {
    * compilation [unit].
    */
   void inferCompilationUnit(CompilationUnitElement unit) {
-    unit.types.forEach((ClassElement classElement) {
+    for (ClassElement classElement in unit.types) {
       try {
         _inferClass(classElement);
       } on _CycleException {
         // This is a short circuit return to prevent types that inherit from
         // types containing a circular reference from being inferred.
       }
-    });
+    }
   }
 
   /**