Markus Stange eb84b69274 Bug 1591523 - Add NativeLayerRoot::SetLayers. r=jrmuizel
This allows us to somewhat cheaply swap out the entire set of layers.
It also means that clearing the array of layers no longer has quadratic complexity;
in the past, you would do this by calling RemoveLayer once per layer, and RemoveLayer
does a linear scan through the array.

Differential Revision: https://phabricator.services.mozilla.com/D50725

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extra : moz-landing-system : lando
2019-10-29 19:25:36 +00:00
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