Add new filter repaint tests for underinvalidation

This patch adds two new (currently failing) filter repaint tests to show
how we improperly repaint turbulence and image filters. These two tests
should help catch progressions in the future.

BUG=598051,640264

Review-Url: https://codereview.chromium.org/2305023003
Cr-Commit-Position: refs/heads/master@{#418347}
7 files changed