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OverlayManager attaches Overlays to DOM

Description

OverlayManager attaches Overlays to DOM

Instead of having the overlays attach themselves to the DOM, the
OverlayManager will attach them instead. This functionality has been
removed from Overlay.show and into OverlayManager.show, which is
renamed from OverlayManager._showOverlay.

A test case for OverlayManager.show has also been added.

Bug: T209129
Change-Id: Ic4c7e43dcd0e009c3c4c432b0b72d917f03713fb

Details

Provenance
JdrewniakAuthored on Jan 3 2019, 1:50 PM
Parents
rEMFR4cbbff3e0a7e: Hygiene: remove unused Overlay.defaults.fixedHeader
Branches
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Tags
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ChangeId
Ic4c7e43dcd0e009c3c4c432b0b72d917f03713fb