dart2js: rewrite_async: Don't call JavaScript factory constructor with 'new'

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index af753d187d68c7bec872cd1c8b4bb96b63a4cb50..598763a62eb216e4565bcf181a98c8af5a69effc 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -1288,7 +1288,7 @@ class JavaScriptBackend {
             asyncHelper:
                 emitter.staticFunctionAccess(commonElements.asyncHelper),
             wrapBody: emitter.staticFunctionAccess(commonElements.wrapBody),
-            newCompleter: emitter
+            completerFactory: emitter
                 .staticFunctionAccess(commonElements.syncCompleterConstructor),
             safeVariableName: namer.safeVariablePrefixForAsyncRewrite,
             bodyName: namer.deriveAsyncBodyName(name));
@@ -1297,7 +1297,7 @@ class JavaScriptBackend {
         rewriter = new SyncStarRewriter(reporter, element,
             endOfIteration:
                 emitter.staticFunctionAccess(commonElements.endOfIteration),
-            newIterable: emitter.staticFunctionAccess(
+            iterableFactory: emitter.staticFunctionAccess(
                 commonElements.syncStarIterableConstructor),
             yieldStarExpression:
                 emitter.staticFunctionAccess(commonElements.yieldStar),