Commits on Dec 5, 2017
  1. Add <img decoding>

    vmpstr authored and annevk committed Dec 5, 2017
    The decoding attribute indicates a decoding hint to the user agent. This hint aids the user agent in deciding how to process and decode the image before rasterizing it. Possible values are as follows:
    * "sync": prefer to decode the image synchronously for atomic presentation with other content
    * "async": prefer to decode the image asynchronously to reduce delay in presenting other content
    * "auto": default mode, which indicates no preference for the decoding mode.
    Fixes #1920.