ScreenOrientationControllerTest (1) currently creates a WebviewTestHelper (2) object, which creates a new TestContentClientInitializer object. The test suite setup already creates a TestContentClientInitializer, but the fact that a second is being created means all initialization logic in TestContentClientInitalizer needs to be idempotent, which isn't ideal. This appears to be the only test that creates multiple TestContentClientInitializer objects.

1) https://cs.chromium.org/chromium/src/ui/views/test/webview_test_helper.h
2) https://cs.chromium.org/chromium/src/ash/content/display/screen_orientation_controller_chromeos_unittest.cc