[ng_layout] Rename NGFragmentBase,NGFragment,NGPhysicalFragment

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

Index: third_party/WebKit/Source/core/layout/ng/ng_box_fragment.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_box_fragment.h b/third_party/WebKit/Source/core/layout/ng/ng_box_fragment.h
new file mode 100644
index 0000000000000000000000000000000000000000..36fbaf3e654b663f2aabf756c61817560d633ad2
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/ng_box_fragment.h
@@ -0,0 +1,34 @@
+// 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 NGBoxFragment_h
+#define NGBoxFragment_h
+
+#include "core/CoreExport.h"
+#include "core/layout/ng/ng_units.h"
+#include "core/layout/ng/ng_writing_mode.h"
+#include "core/layout/ng/ng_fragment.h"
+#include "core/layout/ng/ng_physical_box_fragment.h"
+
+namespace blink {
+
+class CORE_EXPORT NGBoxFragment final : public NGFragment {
+ public:
+  NGBoxFragment(NGWritingMode writing_mode,
+                TextDirection direction,
+                NGPhysicalBoxFragment* physical_fragment)
+      : NGFragment(writing_mode, direction, physical_fragment) {}
+
+  NGMarginStrut MarginStrut() const;
+};
+
+DEFINE_TYPE_CASTS(NGBoxFragment,
+                  NGFragment,
+                  fragment,
+                  fragment->Type() == NGPhysicalFragment::kFragmentBox,
+                  fragment.Type() == NGPhysicalFragment::kFragmentBox);
+
+}  // namespace blink
+
+#endif  // NGBoxFragment_h