Re-land r210095 (avoid a tile revalidation on scale change)
Created attachment 300683 [details] Patch
Comment on attachment 300683 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=300683&action=review Yay! > Source/WebCore/platform/graphics/ca/TileGrid.cpp:57 > + if (validationPolicy & TileGrid::PruneSecondaryTiles) > + builder.appendLiteral(", "); For future's sake, check the builder's length instead?
https://trac.webkit.org/r211766
<rdar://problem/30467124>