Invalidate paint properties on paint offset changes

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

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
index a74a9cfe47f342619f3ad508defa9d46070900ec..6d5d8372ca612b3bae4e2f25068a9deed27978aa 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
@@ -791,14 +791,13 @@ static void overrideContaineringBlockContextFromRealContainingBlock(
   context.scroll = properties->propertyTreeState.scroll();
 }
 
-static void deriveBorderBoxFromContainerContext(
+void PaintPropertyTreeBuilder::updateContextForBoxPosition(
     const LayoutObject& object,
     PaintPropertyTreeBuilderContext& context) {
   if (!object.isBoxModelObject())
     return;
 
   const LayoutBoxModelObject& boxModelObject = toLayoutBoxModelObject(object);
-
   switch (object.styleRef().position()) {
     case StaticPosition:
       break;
@@ -884,8 +883,6 @@ void PaintPropertyTreeBuilder::updatePropertiesForSelf(
   FindObjectPropertiesNeedingUpdateScope checkNeedsUpdateScope(object, context);
 #endif
 
-  deriveBorderBoxFromContainerContext(object, context);
-
   updatePaintOffsetTranslation(object, context);
   updateTransform(object, context);
   updateEffect(object, context);