tree d3f2c5cb5c237c0cf5b1dd46c3359c91cc36fc5e
parent ca5f5193913c7851acf2452df2084b608b880014
author Tom Sepez <tsepez@chromium.org> 1616531622 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1616531622 +0000

Prefer Optional<vector> to than unique_ptr<vector>

The use of the unique_ptr in this case is just to provide a no-value
case by means of nullptr. We can avoid the additional indirection
via Optional.

-- Return results by value while we're at it.

Change-Id: I2fae135aa72ae7b6a539effe8647ce1ef44c8346
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/78714
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>