In https://codereview.chromium.org/2384053002/ chaopeng@ put patchset 16 in the commit queue. https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.org/2384053002/300001 shows this at attempt #1 on Oct 11. The cq log shows the system attempting to commit the patch twice.

This caused a breakage when the patch was applied wtice to cc/input/scrollbar_animation_controller_thinning_unittest.cc, you can see this with `git log cc/input/scrollbar_animation_controller_thinning_unittest.cc` and noting that the patch appears twice (the revert too).