Add tests for retargeted event.target in LayoutTests/shadow-dom/

third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html

Index: third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html
diff --git a/third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html b/third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html
index 328e5d58a5ead5688045b23170af4baed532a6d5..c2c619bf816f79ba0e8b299f37b340ef6a3ccd1b 100644
--- a/third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html
+++ b/third_party/WebKit/LayoutTests/shadow-dom/v0/event-composed-path.html
@@ -20,9 +20,16 @@ test(() => {
   let n = createTestTree(test1);
   removeWhiteSpaceOnlyTextNodes(n.test1);
   let log = dispatchEventWithLog(n, n.input, new Event('my-event', { bubbles: true, compsoed: true }));
+  let path = ['input', 'slot', 'slot-parent', 'content', 'shadowroot-v0', 'host',
+              'shadowroot-v1', 'test1'];
   assert_event_path_equals(log,
-                           makeExpectedEventPathLog(
-                             ['input', 'slot', 'slot-parent', 'content', 'shadowroot-v0', 'host',
-                              'shadowroot-v1', 'test1']));
+                           [['input', 'input', null, path],
+                            ['slot', 'input', null, path],
+                            ['slot-parent', 'input', null, path],
+                            ['content', 'input', null, path],
+                            ['shadowroot-v0', 'input', null, path],
+                            ['host', 'input', null, path],
+                            ['shadowroot-v1', 'input', null, path],
+                            ['test1', 'input', null, path]]);
 }, 'EventPath works fine with v0 insertion points & v1 slots.');
 </script>