Ting-Yu Lin 0076add365 Bug 1641085 Part 1 - Add move semantic to nsFrameList, and use it on SetOverflowFrames(). r=mats
It's useful to use `std::move()` to indicate the frames' ownership in one list
is transferred to the another list.

For a frame list managed by AutoFrameListPtr, after moving its frames to
another list, it can be automatically deleted when it is going out of
scope.

Differential Revision: https://phabricator.services.mozilla.com/D88455
2020-08-29 00:22:16 +00:00
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