Set Event.composed flag correctly for some of UA UIEvents

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

Index: third_party/WebKit/LayoutTests/shadow-dom/event-composed.html
diff --git a/third_party/WebKit/LayoutTests/shadow-dom/event-composed.html b/third_party/WebKit/LayoutTests/shadow-dom/event-composed.html
index c93324769002bb67fbf475945a93ce38941cdc6e..33218680b5d76cb731ec9494cf9846f17b542f02 100644
--- a/third_party/WebKit/LayoutTests/shadow-dom/event-composed.html
+++ b/third_party/WebKit/LayoutTests/shadow-dom/event-composed.html
@@ -18,22 +18,62 @@ test(() => {
   assert_equals(e.composed, true);
 }, 'Users should be able to set a composed value.');
 
-test(() => {
+function assertScoped(event) {
   let nodes = createTestTree(host);
-  let log = dispatchEventWithLog(nodes, nodes.target, new Event('test', {bubbles: true}));
+  let log = dispatchEventWithLog(nodes, nodes.target, event);
   let expectedPath = ['target', 'shadowRoot'];
   assert_event_path_equals(log,
                            [['target', null, expectedPath],
                             ['shadowRoot', null, expectedPath]]);
+}
+
+function assertComposed(event) {
+  let nodes = createTestTree(host);
+  let log = dispatchEventWithLog(nodes, nodes.target, event);
+  let expectedPath = ['target', 'shadowRoot', 'host'];
+  assert_event_path_equals(log,
+                           [['target', null, expectedPath],
+                            ['shadowRoot', null, expectedPath],
+                            ['host', null, expectedPath]]);
+}
+
+test(() => {
+  assertScoped(new Event('test', { bubbles: true }));
 }, 'An event should be scoped by default');
 
 test(() => {
+  assertComposed(new Event('test', { bubbles: true, composed: true }));
+}, 'An event should not be scoped if composed is specified');
+
+test(() => {
+  assertScoped(new MouseEvent('click', { bubbles: true }));
+}, 'A synthetic MouseEvent should be scoped by default');
+
+test(() => {
+  assertComposed(new MouseEvent('click', { bubbles: true, composed: true }));
+}, 'A synthetic MouseEvent with composed=true should not be scoped');
+
+test(() => {
+  assertScoped(new FocusEvent('focus', { bubbles: true }));
+}, 'A synthetic FocusEvent should be scoped by default');
+
+test(() => {
+  assertComposed(new FocusEvent('focus', { bubbles: true, composed: true }));
+}, 'A synthetic FocusEvent with composed=true should not be scoped');
+
+function assertUAComposed(eventType, callback) {
   let nodes = createTestTree(host);
-  let log = dispatchEventWithLog(nodes, nodes.target, new Event('test', {bubbles: true, composed: true}));
+  let log = dispatchUAEventWithLog(nodes, nodes.target, eventType, callback);
   let expectedPath = ['target', 'shadowRoot', 'host'];
   assert_event_path_equals(log,
                            [['target', null, expectedPath],
                             ['shadowRoot', null, expectedPath],
                             ['host', null, expectedPath]]);
-}, 'An event should not be scoped if composed is specified');
+}
+
+test(() => {
+  assertUAComposed('click', (target) => { target.click(); });
+}, 'A UA click event should not be scoped');
+
+// TODO(hayato): Test other UIEvents.
 </script>