Invalidate objects when containing block changed

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

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index c6697f74031bf3c15fb8e506454cf652bc2cda6f..bffea5974d5c451e2cec3090823da8184ca3e426 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -770,7 +770,9 @@ public:
     // the layoutObject returned is an ancestor of |paintInvalidationContainer|.
     LayoutObject* container(const LayoutBoxModelObject* paintInvalidationContainer = nullptr, bool* paintInvalidationContainerSkipped = nullptr) const;
     LayoutObject* containerCrossingFrameBoundaries() const;
+    // Finds the container as if this object is fixed-position.
     LayoutBlock* containerForFixedPosition(const LayoutBoxModelObject* paintInvalidationContainer = nullptr, bool* paintInvalidationContainerSkipped = nullptr) const;
+    // Finds the containing block as if this object is absolute-position.
     LayoutBlock* containingBlockForAbsolutePosition() const;
 
     virtual LayoutObject* hoverAncestor() const { return parent(); }
@@ -1504,7 +1506,7 @@ private:
 
     inline void invalidateContainerPreferredLogicalWidths();
 
-    void invalidatePaintOfPreviousPaintInvalidationRect(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason) const;
+    void invalidatePaintOfPreviousPaintInvalidationRect(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason);
 
     LayoutRect previousSelectionRectForPaintInvalidation() const;
     void setPreviousSelectionRectForPaintInvalidation(const LayoutRect&);