Pass the old and new owner documents to the adoptedCallback.

third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html

Index: third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html
diff --git a/third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html b/third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html
index 023fb83dad6daf52b8bc55d9b3a380f82f3015a7..039c6b742c77e06fd93afc1192ae9486369d24d6 100644
--- a/third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html
+++ b/third_party/WebKit/LayoutTests/custom-elements/spec/adopt-node.html
@@ -18,12 +18,12 @@ promise_test((t) => {
     .then(([w1, w2]) => {
       let invocations = [];
       class X extends w1.HTMLElement {
-        adoptedCallback() { invocations.push(['adopted', this, []]); }
+        adoptedCallback() { invocations.push(['adopted', this, arguments]); }
       }
       w1.customElements.define('a-a', X);
       let a = w1.document.createElement('a-a');
       w2.document.adoptNode(a);
-      assert_array_equals_callback_invocations(invocations, [ ['adopted', a, []] ]);
+      assert_array_equals_callback_invocations(invocations, [ ['adopted', a, [w1.document, w2.document]] ]);
     });
 }, 'adopting a custom element to the different document should enqueue an adoptedCallback reaction');