The spec recently updated for HTML5 canvas and now imageSmoothingEnabled should apply to patterns. Currently, only nearest neighbour is done for interpolation when patterns are drawn for chromium even if imageSmoothingEnabled is set to true.
Created attachment 145625 [details] Patch
It looks like some tests are still failing on the cr-linux bot, including your new test: platform/chromium/virtual/gpu/fast/canvas/canvas-imageSmoothingEnabled-patterns.html = IMAGE svg/W3C-SVG-1.1/pservers-grad-06-b.svg = IMAGE svg/custom/pattern-with-transformation.svg = IMAGE I think the latter two should probably be marked for rebaselining as well. Also, the patch is conflicting in TestExpectations and won't apply. Please update, add those two tests above, and re-upload. (You can also move the chunk of failing tests to a different part of TestExpectations to avoid conflicts if you like).
Created attachment 145808 [details] Patch
Created attachment 145877 [details] Patch
Comment on attachment 145877 [details] Patch Great, thanks. r=me
Comment on attachment 145877 [details] Patch Clearing flags on attachment: 145877 Committed r119591: <http://trac.webkit.org/changeset/119591>
All reviewed patches have been landed. Closing bug.