Fix BaseBubbleController close issue.

ui/events/test/cocoa_test_event_utils.mm

Index: ui/events/test/cocoa_test_event_utils.mm
diff --git a/ui/events/test/cocoa_test_event_utils.mm b/ui/events/test/cocoa_test_event_utils.mm
index fb9054459dfad8452dd6ef0f7cffd0b909aaee88..4022104792941c943289f1a9986cbb83e8b1b09d 100644
--- a/ui/events/test/cocoa_test_event_utils.mm
+++ b/ui/events/test/cocoa_test_event_utils.mm
@@ -67,6 +67,14 @@ static NSEvent* MouseEventAtPointInWindow(NSPoint point,
                             pressure:1.0];
 }
 
+NSEvent* RightMouseDownAtPointInWindow(NSPoint point, NSWindow* window) {
+  return MouseEventAtPointInWindow(point, NSRightMouseDown, window, 1);
+}
+
+NSEvent* RightMouseDownAtPoint(NSPoint point) {
+  return RightMouseDownAtPointInWindow(point, nil);
+}
+
 NSEvent* LeftMouseDownAtPointInWindow(NSPoint point, NSWindow* window) {
   return MouseEventAtPointInWindow(point, NSLeftMouseDown, window, 1);
 }