Test for JS objects spoofing Dart objects

tests/compiler/dart2js_native/dart2js_native.status

Index: tests/compiler/dart2js_native/dart2js_native.status
diff --git a/tests/compiler/dart2js_native/dart2js_native.status b/tests/compiler/dart2js_native/dart2js_native.status
index 0191a101c587e89cfc341aaf67984b4d4b85ed20..1daea78e2d1706bcffa5b0a198f7995917a1c744 100644
--- a/tests/compiler/dart2js_native/dart2js_native.status
+++ b/tests/compiler/dart2js_native/dart2js_native.status
@@ -9,6 +9,12 @@
 native_no_such_method_exception4_frog_test: Fail  # Issue 9631
 native_no_such_method_exception5_frog_test: Fail  # Issue 9631
 
+[ $compiler == dart2js && $unminified ]
+fake_thing_test: Fail # Issue 13010
+
+[ $compiler == dart2js && $minified ]
+fake_thing_test: Skip # Test relies on unminified names.
+
 [ $browser || $runtime == jsshell ]
 only_pass_on_d8_test: Fail, OK # This test should only pass on D8.