Ensure TextLayer hiddenCanvasElement is layout-neutral by default#21218

RolandWArnold wants to merge 1 commit intomozilla:mastermozilla/pdf.js:masterfrom

RolandWArnold:fix/text-layer-hidden-canvas-layout-neutralRolandWArnold/pdf.js:fix/text-layer-hidden-canvas-layout-neutralCopy head branch name to clipboard