Commits on Dec 24, 2019

1. Bug 1589669 - Fix snapping and rounding errors causing picture cachin… …

   …g invalidation when zoomed in. r=aosmond,botond
   
   * Fix crash due to shift left causing overflow (debug only)
   * Remove rounding of scrolling offsets and snap to view space instead of
   world space
   
   Differential Revision: https://phabricator.services.mozilla.com/D57017
   
   [wrupdater] From https://hg.mozilla.org/mozilla-central/rev/03fe3d76bd48bdd9be40568a136c131b1d129460

   

   Kris Taeleman authored and moz-gfx committed Dec 24, 2019

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