cc: Add layout test cases for mask tiling.
Add the layout test cases prior to mask tiling patch landing so that we
can have rebaselined expected results when mask tiling lands.
The tests mainly cover the following cases:
* basic border radius
* border-radius with scrolling (applying textures from correct offset)
* border-radius with scale transforms (coverage space conversion)
* border-radius with filters (single texture masks)
* border-radius with demoting filters (single -> multi or vice-versa)
BUG=567293
Review-Url: https://codereview.chromium.org/2689253002
Cr-Commit-Position: refs/heads/master@{#452517}
9 files changed
