Cleanup: Enable 125DSFForUIScaling on by default

ash/test/display_manager_test_api.cc

Index: ash/test/display_manager_test_api.cc
diff --git a/ash/test/display_manager_test_api.cc b/ash/test/display_manager_test_api.cc
index 7627289c2306466d6888819eebb40406a4df357e..6df43b21b096787250e5b5d84f4d273f230a2db4 100644
--- a/ash/test/display_manager_test_api.cc
+++ b/ash/test/display_manager_test_api.cc
@@ -169,5 +169,13 @@ void DisplayManagerTestApi::SetAvailableColorProfiles(
       profiles);
 }
 
+ScopedDisable125DSFForUIScaling::ScopedDisable125DSFForUIScaling() {
+  DisplayInfo::SetUse125DSFForUIScalingForTest(false);
+}
+
+ScopedDisable125DSFForUIScaling::~ScopedDisable125DSFForUIScaling() {
+  DisplayInfo::SetUse125DSFForUIScalingForTest(true);
+}
+
 }  // namespace test
 }  // namespace ash