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 31a5e46b1705d26a9749648bd6c7e0a0a0db04e8..accfd6908133a971011a22f280834e8c8b2437b5 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -1479,6 +1479,11 @@ 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