Use original repaint tests for spv2

We'll still need rect-based paint invalidation for spv2 at least for
some time, and repaint tests for spv1 have been modified to be suitable
for spv2, so remove paint/invalidation/spv2 (will be in a separate CL
to reduce size of this one) and run the original repaint tests for


Cr-Commit-Position: refs/heads/master@{#396291}
8 files changed