Make NGFragment to own NGPhysicalFragment

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"
 #include "core/layout/ng/ng_units.h"
 #include "platform/LayoutUnit.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class NGPhysicalFragmentBase;
 
-class CORE_EXPORT NGFragmentBase : public GarbageCollected<NGFragmentBase> {
+class CORE_EXPORT NGFragmentBase
+    : public GarbageCollectedFinalized<NGFragmentBase> {
  public:
   NGWritingMode WritingMode() const {
     return static_cast<NGWritingMode>(writing_mode_);
   }
   NGDirection Direction() const { return static_cast<NGDirection>(direction_); }
 
   // Returns the border-box size.
   LayoutUnit InlineSize() const;
   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_;
+    return physical_fragment_.get();
   };
 
-  DECLARE_TRACE();
+  DEFINE_INLINE_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_;
+  std::unique_ptr<NGPhysicalFragmentBase> physical_fragment_;
 
   unsigned writing_mode_ : 3;
   unsigned direction_ : 1;
 };
 
 }  // namespace blink
 
 #endif  // NGFragmentBase_h