Add a web platform test for APNG
While animated-png.html uses internals for selecting frames and
verifying that we decode APNGs properly, this test confirms that a
basic animation will work correctly, and can work in other browsers.
- apng.png
A simple APNG with two frames. The first frame is red, and displays
for as short a time as possible (11 ms; anything less than that and
Chromium increases the time), followed by a green frame. The image
does not loop. The green frame matches green.png, which already
exists
- animated-png-timeout-ref.html
Reference page showing the existing image (green.png).
BUG=437662
Review-Url: https://codereview.chromium.org/2814453004
Cr-Commit-Position: refs/heads/master@{#464038}
3 files changed
