Remove deprecated flush calls.

Bug: skia:10118
Change-Id: I13758b5416784c296b8b5be9f3228230ac1be05f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290540
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
7 files changed