Unreviewed. Rebaseline fast/canvas/canvas-toDataURL-webp.html
Unreviewed. Rebaseline fast/canvas/canvas-toDataURL-webp.html

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

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@146854 bbb929c8-8fbe-4397-9dbb-9b2b20218538
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