[LayoutNG] Add base class for NGFragment and NGText

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

Index: third_party/WebKit/Source/core/layout/ng/ng_fragment_base.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_fragment.h b/third_party/WebKit/Source/core/layout/ng/ng_fragment_base.h
similarity index 75%
copy from third_party/WebKit/Source/core/layout/ng/ng_fragment.h
copy to third_party/WebKit/Source/core/layout/ng/ng_fragment_base.h
index 98077b22a75d374a4dcde1b0a4ba801baf8eddc8..d8910a1d2d63a3a38883c8348eec2c777d142b81 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_fragment.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_fragment_base.h
@@ -2,8 +2,8 @@
 // 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
+#ifndef NGFragmentBase_h
+#define NGFragmentBase_h
 
 #include "core/CoreExport.h"
 #include "platform/LayoutUnit.h"
@@ -12,13 +12,8 @@
 
 namespace blink {
 
-class CORE_EXPORT NGFragment final : public GarbageCollected<NGFragment> {
+class CORE_EXPORT NGFragmentBase : public GarbageCollected<NGFragmentBase> {
  public:
-  NGFragment(LayoutUnit inlineSize,
-             LayoutUnit blockSize,
-             LayoutUnit inlineOverflow,
-             LayoutUnit blockOverflow);
-
   // Returns the border-box size.
   LayoutUnit inlineSize() const { return m_inlineSize; }
   LayoutUnit blockSize() const { return m_blockSize; }
@@ -34,21 +29,24 @@ class CORE_EXPORT NGFragment final : public GarbageCollected<NGFragment> {
   // Should only be used by the parent fragement's layout.
   void setOffset(LayoutUnit inlineOffset, LayoutUnit blockOffset);
 
+  DEFINE_INLINE_TRACE_AFTER_DISPATCH() {}
   DECLARE_TRACE();
 
- private:
+ protected:
+  NGFragmentBase(LayoutUnit inlineSize,
+                 LayoutUnit blockSize,
+                 LayoutUnit inlineOverflow,
+                 LayoutUnit blockOverflow);
+
   LayoutUnit m_inlineSize;
   LayoutUnit m_blockSize;
-
   LayoutUnit m_inlineOverflow;
   LayoutUnit m_blockOverflow;
-
   LayoutUnit m_inlineOffset;
   LayoutUnit m_blockOffset;
-
-  HeapVector<Member<const NGFragment>> m_children;
+  bool m_isText;
 };
 
 }  // namespace blink
 
-#endif  // NGFragment_h
+#endif  // NGFragmentBase_h