Simon Fraser 3d29644eba box-shadow causes overlay scrollbars to be in the wrong position when element is composited ... https://bugs.webkit.org/show_bug.cgi?id=85647 Reviewed by James Robinson. Test overlay scrollbars in composited layers. * ManualTests/scrollbars/scrollbars-in-composited-layers.html: Added. Source/WebCore: The code that positioned the GraphicsLayers for scrollbars failed to take into account any offset between the origin of the compositing layer, and the renderer. This caused scrollbar layers to be misplaced or hidden on layers with, for example, box-shadows. Also moved the code that positions the scrollbar layers into RendderLayerBacking, since this is where all the rest of the GraphicsLayer-positioning code lives. Renamed an "offsetFromLayer" param to "offsetFromRoot" which is more accurate. Manual test, since overlay scrollbars are not enabled in DRT/WTR: ManualTests/scrollbars/scrollbars-in-composited-layers.html * rendering/RenderLayer.cpp: (WebCore::RenderLayer::positionOverflowControls): * rendering/RenderLayerBacking.cpp: (WebCore::RenderLayerBacking::positionOverflowControlsLayers): * rendering/RenderLayerBacking.h: (RenderLayerBacking): Canonical link: https://commits.webkit.org/114042@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@127943 268f45cc-cd09-0410-ab3c-d52691b4dbfc		2012-09-08 00:48:40 +00:00
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scrollbars-in-composited-layers.html	box-shadow causes overlay scrollbars to be in the wrong position when element is composited	2012-09-08 00:48:40 +00:00