[Webkit-unassigned] [Bug 78404] [chromium] Replace RefPtr with OwnPtr for CCLayerImpl tree structure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78404





--- Comment #5 from Tien-Ren Chen <trchen at chromium.org>  2012-02-13 15:17:31 PST ---
Now I think of it, we still need some way to do inter-layer referencing. The scrolling layer need to know its two scrollbar layers, and the scrollbar layer also needs to know its scrolling layer.

I have two proposed implementation:

A. Keep a ID-->Layer HashMap in CCLayerTreeHostImpl, so the CCLayerImpl only remembers the layer ID, look up the layer pointer on demand.

B. Add another pass in TreeSynchronizer to resolve the pointers after the layer tree has been constructed.

Personally I prefer the second implementation, any comments?

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