There is a new Compositing Reason ("blending") added in: <https://webkit.org/b/99200> Add support for blendmode to Core Animation layer The Inspector should list that as a reason.
<rdar://problem/15783387>
Note to self: - Source/WebCore/inspector/prototype/LayerTree.json => update CompositingReasons to include "blending" - Source/WebCore/inspector/InspectorLayerTreeAgent.cpp => update InspectorLayerTreeAgent::reasonsForCompositingLayer to set blending - Source/WebInspectorUI/UserInterface/LayerTreeSidebarPanel.js => update _populateListOfCompositingReasons to add a user readable string when blending is a reason
<rdar://problem/15783536>
*** This bug has been marked as a duplicate of bug 126159 ***