[ng_layout] Rename NGFragmentBase,NGFragment,NGPhysicalFragment

third_party/WebKit/Source/core/layout/ng/ng_fragment.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 NGFragment_h
 #define NGFragment_h
 
 #include "core/CoreExport.h"
-#include "core/layout/ng/ng_fragment_base.h"
+#include "core/layout/ng/ng_writing_mode.h"
 #include "core/layout/ng/ng_physical_fragment.h"
-#include "core/layout/ng/ng_units.h"
-#include "core/layout/ng/ng_writing_mode.h"
+#include "platform/LayoutUnit.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
-class CORE_EXPORT NGFragment final : public NGFragmentBase {
+class CORE_EXPORT NGFragment : public GarbageCollected<NGFragment> {
  public:
+  NGWritingMode WritingMode() const {
+    return static_cast<NGWritingMode>(writing_mode_);
+  }
+  TextDirection Direction() const {
+    return static_cast<TextDirection>(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;
+
+  NGPhysicalFragment::NGFragmentType Type() const;
+
+  NGPhysicalFragment* PhysicalFragment() const { return physical_fragment_; };
+
+  DECLARE_TRACE();
+
+ protected:
   NGFragment(NGWritingMode writing_mode,
              TextDirection direction,
              NGPhysicalFragment* physical_fragment)
-      : NGFragmentBase(writing_mode, direction, physical_fragment) {}
+      : physical_fragment_(physical_fragment),
+        writing_mode_(writing_mode),
+        direction_(static_cast<unsigned>(direction)) {}
 
-  NGMarginStrut MarginStrut() const;
+  Member<NGPhysicalFragment> physical_fragment_;
+
+  unsigned writing_mode_ : 3;
+  unsigned direction_ : 1;
 };
 
-DEFINE_TYPE_CASTS(NGFragment,
-                  NGFragmentBase,
-                  fragment,
-                  fragment->Type() == NGPhysicalFragmentBase::kFragmentBox,
-                  fragment.Type() == NGPhysicalFragmentBase::kFragmentBox);
-
 }  // namespace blink
 
 #endif  // NGFragment_h