[LayoutNG] Add NGLineBoxFragment

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

 // 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.
 
 #ifndef NGFragmentBuilder_h
 #define NGFragmentBuilder_h
 
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_floating_object.h"
@@ skipping 81 matching lines @@
   NGFragmentBuilder& SetEndMarginStrut(const NGMarginStrut& from) {
     end_margin_strut_ = from;
     return *this;
   }
 
   // Offsets are not supposed to be set during fragment construction, so we
   // do not provide a setter here.
 
   // Creates the fragment. Can only be called once.
   RefPtr<NGLayoutResult> ToBoxFragment();
-  RefPtr<NGPhysicalTextFragment> ToTextFragment(unsigned index,
-                                                unsigned start_offset,
-                                                unsigned end_offset);
 
   Vector<RefPtr<NGPhysicalFragment>>& MutableChildren() { return children_; }
 
   Vector<NGLogicalOffset>& MutableOffsets() { return offsets_; }
 
   // Mutable list of floats that need to be positioned.
   Vector<RefPtr<NGFloatingObject>>& MutableUnpositionedFloats() {
     return unpositioned_floats_;
   }
 
@@ skipping 61 matching lines @@
   Vector<NGLogicalOffset> floating_object_offsets_;
   Vector<RefPtr<NGFloatingObject>> positioned_floats_;
 
   WTF::Optional<NGLogicalOffset> bfc_offset_;
   NGMarginStrut end_margin_strut_;
 };
 
 }  // namespace blink
 
 #endif  // NGFragmentBuilder