Index: third_party/WebKit/LayoutTests/custom-elements/spec/resources/custom-elements-helpers.js |
diff --git a/third_party/WebKit/LayoutTests/custom-elements/spec/resources/custom-elements-helpers.js b/third_party/WebKit/LayoutTests/custom-elements/spec/resources/custom-elements-helpers.js |
index 114e1b00bc6ffb268a28a110e75a443962c4ef7d..14fd646a956ad04debaeaeebd55505f0317d006b 100644 |
--- a/third_party/WebKit/LayoutTests/custom-elements/spec/resources/custom-elements-helpers.js |
+++ b/third_party/WebKit/LayoutTests/custom-elements/spec/resources/custom-elements-helpers.js |
@@ -43,3 +43,8 @@ function assert_array_equals_callback_invocations(actual, expected, description) |
assert_array_equals(actual[i][2], expected[i][2], callback + ' should be invoked with the arguments ' + expected[i][2]); |
} |
} |
+ |
+function assert_is_upgraded(element, className, description) { |
+ assert_true(element.matches(':defined'), description); |
+ assert_equals(Object.getPrototypeOf(element), className.prototype, description); |
+} |