Refactor to centralize code which decides whether ObjectPaintProperties are needed.

third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
index b86ac35b42a4954b3cf3c7ad1a5bc522444aaea4..4f668ba96563fcf89dc87343aff4f11df29817e5 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.h
@@ -161,6 +161,12 @@ class PaintPropertyTreeBuilder {
   ALWAYS_INLINE static void UpdateOutOfFlowContext(
       const LayoutObject&,
       PaintPropertyTreeBuilderContext&);
+
+  // Ensure the ObjectPaintProperties object is created if it will be needed, or
+  // cleared otherwise.
+  ALWAYS_INLINE static void UpdatePaintProperties(
+      const LayoutObject&,
+      PaintPropertyTreeBuilderContext&);
 };
 
 }  // namespace blink