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`setViewport` automatically adds an item to the history if it finds that it moved for more than a page, which we don't want to do when automatically scrolling, as with inertial scrolling. This commit adds a new function `setViewportWithHistory()` which takes an argument to optionally avoid preserving history. This avoids breaking ABI. The new history-less functionality is used when inertially scrolling. BUG: 421354 FIXED-IN: 1.11.2
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