Support the ImageBitmap interface: https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap
This includes createImageBitmap() with the options object (with settings like premultiplyAlpha). This is useful for better performance for preparing images for use in a canvas. In particular it helps speed up WebGL texture uploads, since the decode & premultiply step can be done asynchronously in advance instead of inside the texImage2D() call.
It will also unblock other APIs like the "imagebitmap" rendering context and OffscreenCanvas.