tree 937557af83ad5deff72ecd880d9cdca3ed8a4f59
parent e93f55fa2075cff51836e9a5c178eefd1a72b659
author Lei Zhang <thestig@chromium.org> 1561152771 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1561152771 +0000

Clean up image_diff_png.cpp.

- Merge anonymous namespaces, and put more code into the anonymous
  namespace.
- Initialize member variables where defined.
- Use constexpr in more places.
- s/NULL/nullptr/

Change-Id: I94ae18b46239b41cce8cda542b0f264d0d6f4601
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/56730
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>