tree c4aa575ea8a8953a28d57536df80a1663b3a0da9
parent 6caa1897fd2c681fdc720dfa92c2b93f8e2645aa
author Tom Sepez <tsepez@chromium.org> 1561142822 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1561142822 +0000

Make SharedCopyOnWrite() invoke class-specific Clone() method.

Underpinnings for use of SharedCopyOnWrite() with classes that
are subclassed so that it may someday replace the cumbersome
CPDF_CountedObject<> mechanism. This is essentialy the "virtual
copy constructor" pattern implemented as a Clone() method.

No functional change.

Change-Id: I8f583fc9f541c27736dfb963a317670151f3ff2a
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/56712
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>