Clear scroll anchor on all parent scrollers from ScrollAnchor::clear

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 5b53c942d9f074f3a3142b99b1e46464bc31299a..5722b405e44838391a8e6e32d754ad22c5059cf0 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -2710,10 +2710,16 @@ void LayoutObject::willBeRemovedFromTree() {
   }
 }
 
-void LayoutObject::maybeClearIsScrollAnchorObject() {
-  if (m_bitfields.isScrollAnchorObject())
-    m_bitfields.setIsScrollAnchorObject(
-        findReferencingScrollAnchors(this, DontClear));
+void LayoutObject::clearIsScrollAnchorObject(bool unconditionally) {
+  if (!m_bitfields.isScrollAnchorObject())
+    return;
+
+  if (unconditionally) {
+    m_bitfields.setIsScrollAnchorObject(false);
+    return;
+  }
+  m_bitfields.setIsScrollAnchorObject(
+      findReferencingScrollAnchors(this, DontClear));
 }
 
 void LayoutObject::removeFromLayoutFlowThread() {