1 files changed, 23 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/RenderBoxModelObject.cpp b/Source/WebCore/rendering/RenderBoxModelObject.cpp
index fcca1b3d5..b23ad9980 100644
--- a/Source/WebCore/rendering/RenderBoxModelObject.cpp
+++ b/Source/WebCore/rendering/RenderBoxModelObject.cpp
@@ -3017,4 +3017,27 @@ void RenderBoxModelObject::mapAbsoluteToLocalPoint(bool fixed, bool useTransform
         transformState.move(containerOffset.width(), containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
 }
 
+void RenderBoxModelObject::moveChildTo(RenderBoxModelObject* toBoxModelObject, RenderObject* child, RenderObject* beforeChild, bool fullRemoveInsert)
+{
+    ASSERT(this == child->parent());
+    ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent());
+    if (fullRemoveInsert && (toBoxModelObject->isRenderBlock() || toBoxModelObject->isRenderInline())) {
+        // Takes care of adding the new child correctly if toBlock and fromBlock
+        // have different kind of children (block vs inline).
+        toBoxModelObject->addChild(virtualChildren()->removeChildNode(this, child), beforeChild);
+    } else
+        toBoxModelObject->virtualChildren()->insertChildNode(toBoxModelObject, virtualChildren()->removeChildNode(this, child, fullRemoveInsert), beforeChild, fullRemoveInsert);
+}
+
+void RenderBoxModelObject::moveChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* startChild, RenderObject* endChild, RenderObject* beforeChild, bool fullRemoveInsert)
+{
+    ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent());
+    for (RenderObject* child = startChild; child && child != endChild; ) {
+        // Save our next sibling as moveChildTo will clear it.
+        RenderObject* nextSibling = child->nextSibling();
+        moveChildTo(toBoxModelObject, child, beforeChild, fullRemoveInsert);
+        child = nextSibling;
+    }
+}
+
 } // namespace WebCore