Store render target dirty msaa rect in real dst space.

The stored rect will already be adjusted for origin and actual backing
surface height.

This is needed since proxy doesn't store origin anymore, it doesn't
make sense for it to hold onto a rect which itself is dependent on
origin.

Bug: skia:9556
Change-Id: I41a2755970b9d5d1518dfa16a61a78af7c8ae2c0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270448
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
16 files changed