Ensure that TextLayerBuilder works correctly without the abortSignal parameter (PR 20928 follow-up)#20934

timvandermeij merged 1 commit intomozilla:mastermozilla/pdf.js:masterfrom

Snuffleupagus:fix-TextLayerBuilder-abortSignalSnuffleupagus/pdf.js:fix-TextLayerBuilder-abortSignalCopy head branch name to clipboard