Update libpng to 1.6.43.
I've verified that our local patches have all been applied
upstream. I've also added myself to OWNERS for the directory,
since I've volunteered to help with Skia codec work.
I've included the loongarch platform-specific files since
there appears to be active loongarch development underway for
Chrome, but they are not yet referenced in our BUILD.gn.
Bug: 334873379
Bug: 332475837
Change-Id: I3131a434aca421fbfe2f2eca5ab692e55d76c91b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5454197
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Cr-Commit-Position: refs/heads/main@{#1287444}
NOKEYCHECK=True
GitOrigin-RevId: ebf6d473ea1ee1963abd3afa4e18719b66be0719
32 files changed
