MacViews: Implement Full Keyboard Access.

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 d30737261a85e2f66ba0b0f047d1e2ad6ce5f3b2..9cf96b724d953011d8e7802b58e4d94218c434ff 100644
--- a/ui/views/test/views_test_helper_mac.h
+++ b/ui/views/test/views_test_helper_mac.h
@@ -14,6 +14,7 @@ namespace ui {
 namespace test {
 class ScopedFakeNSWindowFocus;
 class ScopedFakeNSWindowFullscreen;
+class ScopedFakeFullKeyboardAccess;
 }
 class ScopedAnimationDurationScaleMode;
 }
@@ -46,6 +47,13 @@ class ViewsTestHelperMac : public ViewsTestHelper {
   // permitting a unit test to 'fake' toggling fullscreen mode.
   std::unique_ptr<ui::test::ScopedFakeNSWindowFullscreen> faked_fullscreen_;
 
+  // Enable fake full keyboard access by default, so that tests don't depend on
+  // system setting of the test machine. Also, this helps to make tests on Mac
+  // more consistent with other platforms, where most views are focusable by
+  // default.
+  std::unique_ptr<ui::test::ScopedFakeFullKeyboardAccess>
+      faked_full_keyboard_access_;
+
   DISALLOW_COPY_AND_ASSIGN(ViewsTestHelperMac);
 };