This should be covered by a green overlay. A single square should be visible covered by a green overlay. This test ensures that transforming a non-fast scrollable area correctly updates list of non-fast scrollable rects (See http://crbug.com/417345). On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS nonFastScrollableRects.length is 1 PASS rectToString(nonFastScrollableRects[0]) is "[0, 0, 222, 222]" Trigger style update PASS internals.updateStyleAndReturnAffectedElementCount() is 1 Verifying layout hasn't been triggered PASS internals.needsLayoutCount() is 3 Update non-fast element's transform Trigger style update PASS internals.updateStyleAndReturnAffectedElementCount() is 1 Verifying layout still hasn't been triggered PASS internals.needsLayoutCount() is 3 Verifying non-fast regions have been updated PASS nonFastScrollableRects.length is 1 PASS rectToString(nonFastScrollableRects[0]) is "[110, 10, 222, 222]" PASS successfullyParsed is true TEST COMPLETE