[chromium] Rebaseline canvas-toDataURL-webp test expectations
https://bugs.webkit.org/show_bug.cgi?id=93310

Unreviewed test expectations update.

* platform/chromium-mac/fast/canvas/canvas-toDataURL-webp-expected.png:
* platform/chromium-win/fast/canvas/canvas-toDataURL-webp-expected.png:
* platform/chromium/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146848 268f45cc-cd09-0410-ab3c-d52691b4dbfc