[LayoutNG] Handle empty inlines and border edges

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/inline/ng_physical_text_fragment.h"
 #include "core/layout/ng/ng_block_break_token.h"
 #include "core/layout/ng/ng_block_node.h"
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_fragment.h"
 #include "core/layout/ng/ng_layout_result.h"
 #include "core/layout/ng/ng_physical_box_fragment.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 // TODO(ikilpatrick): Make writing mode and direction be in the constructor.
 NGFragmentBuilder::NGFragmentBuilder(NGPhysicalFragment::NGFragmentType type,
                                      NGLayoutInputNode node)
     : type_(type),
       writing_mode_(kHorizontalTopBottom),
       direction_(TextDirection::kLtr),
       node_(node),
       layout_object_(node.GetLayoutObject()),
-      did_break_(false),
-      border_edges_(NGBorderEdges::kAll) {}
+      did_break_(false) {}
 
 NGFragmentBuilder::NGFragmentBuilder(NGPhysicalFragment::NGFragmentType type,
                                      LayoutObject* layout_object)
     : type_(type),
       writing_mode_(kHorizontalTopBottom),
       direction_(TextDirection::kLtr),
       node_(nullptr),
       layout_object_(layout_object),
       did_break_(false) {}
 
@@ skipping 185 matching lines @@
     NGPhysicalFragment* floating_fragment = positioned_float.fragment.Get();
     floating_fragment->SetOffset(
         positioned_float.logical_offset.ConvertToPhysical(
             writing_mode_, direction_, physical_size,
             floating_fragment->Size()));
   }
 
   RefPtr<NGPhysicalBoxFragment> fragment = AdoptRef(new NGPhysicalBoxFragment(
       layout_object_, physical_size, overflow_.ConvertToPhysical(writing_mode_),
       children_, positioned_floats_, bfc_offset_, end_margin_strut_,
-      NGBorderEdges::ToPhysical(border_edges_, writing_mode_),
-      std::move(break_token)));
+      border_edges_.ToPhysical(writing_mode_), std::move(break_token)));
 
   return AdoptRef(
       new NGLayoutResult(std::move(fragment), out_of_flow_descendants_,
                          out_of_flow_positions_, unpositioned_floats_));
 }
 
 }  // namespace blink