pkg/dev_compiler/lib/js/amd/dart_sdk.js

Index: pkg/dev_compiler/lib/js/amd/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/amd/dart_sdk.js b/pkg/dev_compiler/lib/js/amd/dart_sdk.js
index ebd0c84010463350dc792e95aa561ea649381a52..5f518fcf6710ac69ef6c68dd96572fe84b81658e 100644
--- a/pkg/dev_compiler/lib/js/amd/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/amd/dart_sdk.js
@@ -1780,7 +1780,7 @@ define([], function() {
     if (actuals.length < type.args.length) return false;
     let index = 0;
     for (let i = 0; i < type.args.length; ++i) {
-      if (!dart.instanceOfOrNull(actuals[i], type.args[i])) return false;
+      dart.check(actuals[i], type.args[i]);
       ++index;
     }
     if (actuals.length == type.args.length) return true;
@@ -1788,7 +1788,7 @@ define([], function() {
     if (type.optionals.length > 0) {
       if (extras > type.optionals.length) return false;
       for (let i = 0, j = index; i < extras; ++i, ++j) {
-        if (!dart.instanceOfOrNull(actuals[j], type.optionals[i])) return false;
+        dart.check(actuals[j], type.optionals[i]);
       }
       return true;
     }
@@ -1801,7 +1801,7 @@ define([], function() {
       if (!dart.hasOwnProperty.call(type.named, name)) {
         return false;
       }
-      if (!dart.instanceOfOrNull(opts[name], type.named[name])) return false;
+      dart.check(opts[name], type.named[name]);
     }
     return true;
   };