Fix in-test (missing parenthesis).

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index 76d382a35ac40aeeb529cd34a2ffd6c80a23db01..803edb6e585ba404a5822dcfef1d49acba185327 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -1039,7 +1039,8 @@ class OldEmitter implements Emitter {
     cspPrecompiledFunctionFor(outputUnit).add(js.statement(r'''
         {
           #constructorName.#typeNameProperty = #constructorNameString;
-          if (!"name" in #constructorName)
+          // IE does not have a name property.
+          if (!("name" in #constructorName))
               #constructorName.name = #constructorNameString;
           $desc = $collectedClasses$.#constructorName[1];
           #constructorName.prototype = $desc;