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Replace GetTransformForRect with gfx::TransformBetweenRects.

Test: manual
Bug: none
Change-Id: I0e699c1caa28a8c8decca18b579070cc90aa5d0d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1834643
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Auto-Submit: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702060}