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This CL allows us to soft-apply cropping and scaling on opaque buffer
handles.  The wrapping frame retains no resource regarding the opaque
buffer handles and acts simply as a decorator to expose different
visible rectangle and natural size.  Any operation involving the opaque
buffer handles are relayed to the wrapped frame.

Bug: 982201
Change-Id: If51308c92adeb33d60627386545cadfe1f17edcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1830243
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701490}