Place the out of flow positioned blocks

third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_fragment_builder.h"
 
 #include "core/layout/ng/ng_block_node.h"
 #include "core/layout/ng/ng_fragment_base.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_physical_text_fragment.h"
@@ skipping 30 matching lines @@
 NGFragmentBuilder& NGFragmentBuilder::SetInlineOverflow(LayoutUnit size) {
   overflow_.inline_size = size;
   return *this;
 }
 
 NGFragmentBuilder& NGFragmentBuilder::SetBlockOverflow(LayoutUnit size) {
   overflow_.block_size = size;
   return *this;
 }
 
-NGFragmentBuilder& NGFragmentBuilder::AddChild(NGFragmentBase* child,
-                                               NGLogicalOffset child_offset) {
+NGFragmentBuilder& NGFragmentBuilder::AddChild(
+    NGFragmentBase* child,
+    const NGLogicalOffset& child_offset) {
   DCHECK_EQ(type_, NGPhysicalFragmentBase::kFragmentBox)
       << "Only box fragments can have children";
   children_.append(child->PhysicalFragment());
   offsets_.append(child_offset);
   // Collect child's out of flow descendants.
   const NGPhysicalFragmentBase* physical_fragment = child->PhysicalFragment();
   const Vector<NGStaticPosition>& oof_positions =
       physical_fragment->OutOfFlowPositions();
   size_t oof_index = 0;
   for (auto& oof_node : physical_fragment->OutOfFlowDescendants()) {
@@ skipping 100 matching lines @@
       out_of_flow_positions_);
 }
 
 DEFINE_TRACE(NGFragmentBuilder) {
   visitor->trace(children_);
   visitor->trace(out_of_flow_descendant_candidates_);
   visitor->trace(out_of_flow_descendants_);
 }
 
 }  // namespace blink