Create new layer to reduce work on high DPI displays
Create new layer to reduce work on high DPI displays

Force a new stacking context to prevent a large, duplicate paint layer
from being created for tree-view's scrolling contents that can make the
cost of layer tree updates scale at 3x the size of the layer rather than
the optimal 1x.

On high resolution displays, Chromium handles layers for scrolling
content differently and inadvertently creates a duplicate paint layer
the size of .tree-view-scroller because descendants of the scroller
overlap the auto-created layer.
samu/tree-view,jarig/tree-view,atom/tree-view,learn-co/learn-ide-tree