Once https://chromium-review.googlesource.com/c/chromium/src/+/1351809 lands, running the disabled DifferentDeviceScaleFactorDisplayTabDragControllerTest.CursorDeviceScaleFactor results in the following on the interactive_ui_tests stage of the linux-chromeos-rel bot:

../../chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc:2279: Failure
Expected equality of these values:
  kDeviceScaleFactorExpectations[index - 1]
    Which is: 2
  test->GetCursorDeviceScaleFactor()
    Which is: 1
Google Test trace:
../../chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc:2270: 3

../../chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc:2279: Failure
Expected equality of these values:
  kDeviceScaleFactorExpectations[index - 1]
    Which is: 2
  test->GetCursorDeviceScaleFactor()
    Which is: 1
Google Test trace:
../../chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc:2270: 4

This means the scale factor never changes from 1 to 2 during the test, which is the whole point of the test.