Internals of the CrOS gallery

The gallery is internally called "media app". You can open it by typing in "chrome://media-app".

The gallery lives in chrome/browser/ash/system_web_apps/apps/media_app/ and ash/webui/media_app_ui/. You can download chrome/ and ash/ with the URL format https://chromium.googlesource.com/chromium/src/+archive/main/[name].tar.gz

The innermost internals aren't public, instead mocked by ash/webui/media_app_ui/resources/mock/js/app_main.ts.