tree 663e8c4abbb8a40795822c0e1267dd6fc86a1d60
parent 5175c939c848f43eaba9c18d452addd286073d18
author Tom Sepez <tsepez@chromium.org> 1556563929 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1556563929 +0000

Add RetainPtr<>::BackPointer() method.

Return an UnownedPtr from a RetainPtr. Prefered over calls to Get(),
since calls to Get() are almost always avoidable except in this one
circumstance where we would otherwise have a cycle of RetainPtr.

Use it in one place and remove some Get() calls along the way. In turn,
keep a RetainPtr in one class where we didn't really need a backpointer.

Change-Id: I89bb6291dc71a62d6aa989858c6e62aaa599ee17
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/53617
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>