Support intercepted getters, setters and index operations.

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

Index: pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
index 7f53cbd5ab054cfdb3b6d2cae107412beb767613..9c3b1f57e90b50d3ceb73d939cefb381451dfd29 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
@@ -338,7 +338,9 @@ class ContainerBuilder extends CodeEmitterHelper {
       compiler.internalError(member,
           'Unexpected kind: "${member.kind}".');
     }
-    if (member.isInstanceMember) emitExtraAccessors(member, builder);
+    if (member.isInstanceMember) {
+      emitExtraAccessors(member, builder);
+    }
   }
 
   void addMemberMethod(FunctionElement member, ClassBuilder builder) {