Added a test for dump-info with lots of closures.

sdk/lib/_internal/compiler/implementation/dump_info.dart

Index: sdk/lib/_internal/compiler/implementation/dump_info.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dump_info.dart b/sdk/lib/_internal/compiler/implementation/dump_info.dart
index a5e52e54a15dcda0ba69281699a638c3124b8125..fa79c1d46a94a1d14d8a9cf5d5b8ae396c4e9e5b 100644
--- a/sdk/lib/_internal/compiler/implementation/dump_info.dart
+++ b/sdk/lib/_internal/compiler/implementation/dump_info.dart
@@ -192,9 +192,9 @@ class ElementToJsonVisitor extends ElementVisitor<Map<String, dynamic>> {
     List<String> children = [];
     StringBuffer emittedCode = compiler.dumpInfoTask.codeOf(element);
 
-    // If a field has an empty inferred type it is never used.
     TypeMask inferredType =
-      compiler.typesTask.getGuaranteedTypeOfElement(element);
+        compiler.typesTask.getGuaranteedTypeOfElement(element);
+    // If a field has an empty inferred type it is never used.
     if (inferredType == null || inferredType.isEmpty || element.isConst) {
       return null;
     }