Prepare RenderSVGContainer culling, bug 44896.
Created attachment 66057 [details]
Comment on attachment 66057 [details]
Great that you split more parts out of the original patch. Just rephrase the first sentence in your Cahngelog. "Add styleWillChange methods ... if the style difference is StyleDifferenceLayout" The if sounds a bit strange here. And you should mention that the follow-up patch will cache the rects for container. Souds like a feature for the far future here :-)
Landed in r66584.