Sort type tests.

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

Index: pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
index 0bc14c3ddc95f80dbb0f6d93c5da34792d3bc810..24c6de941c473ae8cf3b2fac02de4efcda8ece5e 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
@@ -783,7 +783,7 @@ class ProgramBuilder {
     List<StubMethod> checkedSetters = <StubMethod>[];
     List<StubMethod> isChecks = <StubMethod>[];
     if (_nativeData.isJsInteropClass(cls)) {
-      typeTests.properties.forEach((js.Name name, js.Node code) {
+      typeTests.forEachProperty(_sorter, (js.Name name, js.Node code) {
         _classes[_commonElements.jsInterceptorClass]
             .isChecks
             .add(_buildStubMethod(name, code));
@@ -800,7 +800,7 @@ class ProgramBuilder {
         }
       }
 
-      typeTests.properties.forEach((js.Name name, js.Node code) {
+      typeTests.forEachProperty(_sorter, (js.Name name, js.Node code) {
         isChecks.add(_buildStubMethod(name, code));
       });
     }