Import web-platform-tests@88b9a65ce806b5f67e0a535bf2f1602c2df6af58

third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html

Index: third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html
diff --git a/third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html b/third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html
index 5c35f6b66010464b0f5cff6d69626dab5f5afd8c..d7445d4328b1b04c0e4d53d409f4d35ac03d0887 100644
--- a/third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html
+++ b/third_party/WebKit/LayoutTests/imported/web-platform-tests/shadow-dom/leaktests/html-collection.html
@@ -20,7 +20,8 @@
   <script></script>
 </template>
 <div id='doc'></div>
-<div id='host'></div>
+<div id='host-open'></div>
+<div id='host-closed'></div>
 </body>
 <script>
 'use strict';
@@ -41,9 +42,13 @@ var doc = document.getElementById('doc');
 fillTemplate(doc, 'doc-');
 
 // Construct shadow subtree with 'shadow-*' ids.
-var host = document.getElementById('host');
+var host = document.getElementById('host-open');
 var shadow = host.attachShadow({mode: 'open'});
-fillTemplate(shadow, 'shadow-');
+fillTemplate(shadow, 'shadow-open-');
+
+host = document.getElementById('host-closed');
+shadow = host.attachShadow({mode: 'closed'});
+fillTemplate(shadow, 'shadow-closed-');
 
 function testCollection(collection) {
     var elements = document[collection];