Revert "Prepare blink to unify definitions of load completion"

LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html

Index: LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html
diff --git a/LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html b/LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html
index 5e2646fddb218523a77da647a1ff759c4b1a0c29..ca57b93b9a1ec3c1c2133544136a8038943a5de1 100644
--- a/LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html
+++ b/LayoutTests/fast/dom/shadow/adopt-node-with-shadow-root.html
@@ -11,6 +11,7 @@ function test() {
     var foreignDocument = document.getElementById('root').contentDocument;
     shadow = foreignDocument.getElementById('s').createShadowRoot();
     shouldThrow("document.adoptNode(shadow)");
+    location.reload();
 }
 </script>
 </body>