2 files changed, 16 insertions, 0 deletions
diff --git a/components/script/dom/webidls/ActivatableElement.webidl b/components/script/dom/webidls/ActivatableElement.webidl
new file mode 100644
index 00000000000..2b69baff303
--- /dev/null
+++ b/components/script/dom/webidls/ActivatableElement.webidl
@@ -0,0 +1,15 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Interface for testing element activation
+// This interface is entirely internal to Servo, and should not be accessible to
+// web pages.
+[Exposed=(Window,Worker), NoInterfaceObject]
+interface ActivatableElement {
+  [Throws, Pref="dom.testing.element.activation.enabled"]
+  void enterFormalActivationState();
+
+  [Throws, Pref="dom.testing.element.activation.enabled"]
+  void exitFormalActivationState();
+};
diff --git a/components/script/dom/webidls/Element.webidl b/components/script/dom/webidls/Element.webidl
index b0ba81d1816..295d76cd1f4 100644
--- a/components/script/dom/webidls/Element.webidl
+++ b/components/script/dom/webidls/Element.webidl
@@ -122,3 +122,4 @@ partial interface Element {
 Element implements ChildNode;
 Element implements NonDocumentTypeChildNode;
 Element implements ParentNode;
+Element implements ActivatableElement;