[LayoutNG] Fix orthogonal writing mode child margin strut from being used in collapsing margins cal…

third_party/WebKit/Source/core/layout/ng/ng_fragment_base.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 NGFragmentBase_h
 #define NGFragmentBase_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_physical_constraint_space.h"
 #include "core/layout/ng/ng_writing_mode.h"
@@ skipping 18 matching lines @@
   LayoutUnit BlockSize() const;
 
   // Returns the total size, including the contents outside of the border-box.
   LayoutUnit InlineOverflow() const;
   LayoutUnit BlockOverflow() const;
 
   // Returns the offset relative to the parent fragement's content-box.
   LayoutUnit InlineOffset() const;
   LayoutUnit BlockOffset() const;
 
-  NGMarginStrut MarginStrut() const;
-
   NGPhysicalFragmentBase* PhysicalFragment() const {
     return physical_fragment_;
   };
 
   DECLARE_TRACE();
 
  protected:
   NGFragmentBase(NGWritingMode writing_mode,
                  NGDirection direction,
                  NGPhysicalFragmentBase* physical_fragment)
       : physical_fragment_(physical_fragment),
         writing_mode_(writing_mode),
         direction_(direction) {}
 
   Member<NGPhysicalFragmentBase> physical_fragment_;
 
   unsigned writing_mode_ : 3;
   unsigned direction_ : 1;
 };
 
 }  // namespace blink
 
 #endif  // NGFragmentBase_h