Don't invalidate rect if it's covered by fully invalidated parent's visual rect

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 889c6d388be1d9f08cecee4b1bcd5c3dab2690c8..6c0630f4e027e199253684ff6ed6a861e9ea5c2e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -557,6 +557,8 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
            isTableRow() || isTableSection();
   }
 
+  bool isTextOrSVGChild() const { return isText() || isSVGChild(); }
+
   inline bool isBeforeContent() const;
   inline bool isAfterContent() const;
   inline bool isBeforeOrAfterContent() const;
@@ -2129,8 +2131,6 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
   void checkBlockPositionedObjectsNeedLayout();
 #endif
 
-  bool isTextOrSVGChild() const { return isText() || isSVGChild(); }
-
   static bool isAllowedToModifyLayoutTreeStructure(Document&);
 
   // Returns the parent for paint invalidation. For LayoutView, returns the