Implement incremental paint property tree rebuilding

third_party/WebKit/Source/core/layout/LayoutObject.cpp

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index da487f6d549f2634cc1ee0e63bf9756d02b07eee..05643deba378b8642aee9c3e9e8619f8f2115a49 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -1469,6 +1469,11 @@ StyleDifference LayoutObject::adjustStyleDifference(
       // for changed paint property or paint order. Raster invalidation will be
       // issued if needed during paint.
       ObjectPaintInvalidator(*this).slowSetPaintingLayerNeedsRepaint();
+
+      // When transform, opacity, etc. change, paint properties will also change
+      // so we need to mark this object as needing an update.
+      // TODO(pdr): Also update in the non-spv2 codepath?
+      getMutableForPainting().setNeedsPaintPropertyUpdate();
     }
   } else {
     // If transform changed, and the layer does not paint into its own separate