зеркало из https://github.com/mozilla/gecko-dev.git
fa397ea897
If, within a single refresh driver tick, the scroll position is updated by JS explicitly, and then subsequently also updated by a frame reconstruction, the scroll origin from the former (nsGkAtoms::other) can get clobbered by the latter (to nsGkAtoms::restore). The restore scroll origin is "weaker" in that it can be ignored by the APZ code in some circumstances. This is undesirable because it means the JS scroll update also gets ignored. This patch ensures that when setting the scroll origin we don't do this clobbering of stronger origins with weaker origins. MozReview-Commit-ID: DA4EHp1Debu --HG-- extra : rebase_source : 99fd1f91698a605792b2a622450f1ff31bc89101 |
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