(Mac)Views: Widgets focus first View in traversal order if initial focus fails.

ui/views/test/views_test_helper_mac.h

Index: ui/views/test/views_test_helper_mac.h
diff --git a/ui/views/test/views_test_helper_mac.h b/ui/views/test/views_test_helper_mac.h
index fd58853ce715ae7117d9a549c9c1330391527533..abf7c6fc1356ce0a9fffbc4a5a52c3fedb397a48 100644
--- a/ui/views/test/views_test_helper_mac.h
+++ b/ui/views/test/views_test_helper_mac.h
@@ -21,6 +21,8 @@ class ScopedAnimationDurationScaleMode;
 
 namespace views {
 
+class Widget;
+
 class ViewsTestHelperMac : public ViewsTestHelper {
  public:
   ViewsTestHelperMac();
@@ -29,6 +31,7 @@ class ViewsTestHelperMac : public ViewsTestHelper {
   // ViewsTestHelper:
   void SetUp() override;
   void TearDown() override;
+  void SetFullKeyboardAccessState(Widget* widget, bool new_state) override;
 
  private:
   // Disable animations during tests.