[heycam/webidl] Improve the named property visibility algorithm for Window. (#626)

In particular, if a string is a supported property name as well as an own
property of the window or Window.prototype object, we don't need to block
that property from existing on the named properties object, since it will
be shadowed automatically.

Fixes #607.
You can view, comment on, or merge this pull request online at:

  https://github.com/heycam/webidl/pull/626

-- Commit Summary --

  * Improve the named property visibility algorithm for Window.

-- File Changes --

    M index.bs (13)

-- Patch Links --

https://github.com/heycam/webidl/pull/626.patch
https://github.com/heycam/webidl/pull/626.diff

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Received on Friday, 18 January 2019 11:31:21 UTC