Track dirty rects on GrRenderTargets in native space rather than origin-relative

Change-Id: Icccf2fcb5d468696c42c5a0ccf405e30e5e9bc65
Reviewed-on: https://skia-review.googlesource.com/105980
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
12 files changed