afaict the perf surprises associated with:
https://skia-review.googlesource.com/c/skia/+/334417 (Remove SkBaseDevice::flush)
were bc Ganesh resolves MSAA buffers for SkCanvas::flush but doesn't do so for GrDirectContext::flush.
Where possible this CL switches SkCanvas::flush to SkSurface::flush (which will also resolve MSAA buffers) so that when https://skia-review.googlesource.com/c/skia/+/334417 relands there should not be any performance surprises.
Change-Id: I705ad6219f0f625a88cf3f9e8b2418a3182d298c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/335866
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Adlai Holler <adlai@google.com>
