Breaking down Copy ReorderVisuals (1)

Keep ownership of SkUnicode data inside the caller
(SkParagraph, SkText, ...).
Will remove SkUnicode ownership from SkShaper later.

Change-Id: Ib39a794933ae5cf2b3c27c55375b6779331d45f9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/616796
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
10 files changed