commit 3773b71f7c519939d87e2199fa3a901b13289c13
author Jeffrey Young <cowmoo@google.com> Wed Mar 09 19:29:31 2022
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Mar 09 19:29:31 2022
tree 3c890d5d871d2642730eafd4606c8106db21c5e6
parent e8fe77e43e50843fabcba3d32a2e9e18607ab646

wallpaper: remove a hack to clear old images

When an img src tag is changed, the old image is visible while the new
one loads. There was a previous hacky workaround for wallpaper that
manually removed img src tags when navigating away from a wallpaper
collection. This hack + switching to cr-auto-img in
https://crrev.com/c/3488694 caused a bug where viewing the same
wallpaper collection twice in a row incorrectly removed the img src
attribute.

Instead, build this into cr-auto-img with clear-src attr. When
cr-auto-img receives a new auto-src attribute, clear the src first
and then set the new src. This prevents the old image from being
shown while the new one loads, and removes the need for a wallpaper
specific hack.

BUG=1304790
BUG=b:222752163
BUG=b:219799872
TEST=open wallpaper picker, navigate through collections, return to
same collection after clicking back
TEST=browser_tests --gtest_filter="*CrElementsAutoImgTest*"

Change-Id: I048951e17af318e986f402ba1f85d1b6c2b7a5e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3507496
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Jeffrey Young <cowmoo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#979363}