Commits on Nov 12, 2020

1. Update declarative Shadow DOM opt-in mechanics …

   The issue thread [1] has had more discussion, after the initial draft
   of declarative Shadow DOM opt-in landed [2]. This CL implements those
   bits of feedback. In particular:
    - There is no public allowDeclarativeShadowDom state available on
      Document or DocumentFragment.
    - All APIs use call parameters to avoid state, with the exception
      of DOMParser.
    - innerHTML no longer supports Declarative Shadow DOM.
    - A new setInnerHTML() function allows opt-in access to DSD.
    - Several of the more obscure APIs do not have an opt-in for
      declarative Shadow DOM, such as XHR, createContextualFragment, and
      document.write.
    - The sandbox flag has been removed from iframes completely. The new
      plan is to use DocumentPolicy to enable declarative Shadow DOM for
      iframes. For now, iframes always support declarative Shadow DOM.
    - 'allowDeclarativeShadowDOM' has become 'allowShadowRoot'.
   
   [1] whatwg/dom#912 (comment)
   [2] https://chromium-review.googlesource.com/c/chromium/src/+/2513525
   
   Bug: 1042130
   
   Change-Id: I3a2becf2a113cc8647b29077d2efea1c990d4547
   Cq-Do-Not-Cancel-Tryjobs: true
   Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2530222
   Auto-Submit: Mason Freed <masonfreed@chromium.org>
   Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
   Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
   Commit-Queue: Mason Freed <masonfreed@chromium.org>
   Cr-Commit-Position: refs/heads/master@{#826643}

   

   mfreed7 authored and chromium-wpt-export-bot committed Nov 12, 2020
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