Fix render tree creation in blocks with multiple anonymous blocks and mixed inlines/out of flow chi…

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index 6ceab0403b2968b51fbfdbaa3d420dcced3e7de4..023192197fe636b640594315222067f47de2bf28 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -727,7 +727,7 @@ void RenderBlock::addChildIgnoringAnonymousColumnBlocks(RenderObject* newChild,
                 || beforeChildAnonymousContainer->isRenderFullScreenPlaceholder()
                 ) {
                 // Insert the child into the anonymous block box instead of here.
-                if (newChild->isInline() || beforeChild->parent()->firstChild() != beforeChild)
+                if (newChild->isInline() || newChild->isFloatingOrOutOfFlowPositioned() || beforeChild->parent()->firstChild() != beforeChild)
                     beforeChild->parent()->addChild(newChild, beforeChild);
                 else
                     addChild(newChild, beforeChild->parent());