Make DisplayItemClient an interface

third_party/WebKit/Source/core/layout/line/InlineBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 21 matching lines @@
 namespace blink {
 
 class HitTestRequest;
 class HitTestResult;
 class RootInlineBox;
 
 enum MarkLineBoxes { MarkLineBoxesDirty, DontMarkLineBoxes };
 
 // InlineBox represents a rectangle that occurs on a line.  It corresponds to
 // some LayoutObject (i.e., it represents a portion of that LayoutObject).
-class InlineBox {
+class InlineBox : public DisplayItemClient {
     WTF_MAKE_NONCOPYABLE(InlineBox);
 public:
     InlineBox(LayoutObject& obj)
         : m_next(nullptr)
         , m_prev(nullptr)
         , m_parent(nullptr)
         , m_layoutObject(obj)
         , m_logicalWidth()
 #if ENABLE(ASSERT)
         , m_hasBadParent(false)
@@ skipping 43 matching lines @@
 
 #ifndef NDEBUG
     void showTreeForThis() const;
     void showLineTreeForThis() const;
 
     virtual void showBox(int = 0) const;
     virtual void showLineTreeAndMark(const InlineBox* = nullptr, const char* = nullptr, const InlineBox* = nullptr, const char* = nullptr, const LayoutObject* = nullptr, int = 0) const;
 #endif
 
     virtual const char* boxName() const;
-    virtual String debugName() const;
+    String debugName() const override;
 
     bool isText() const { return m_bitfields.isText(); }
     void setIsText(bool isText) { m_bitfields.setIsText(isText); }
 
     virtual bool isInlineFlowBox() const { return false; }
     virtual bool isInlineTextBox() const { return false; }
     virtual bool isRootInlineBox() const { return false; }
 
     virtual bool isSVGInlineTextBox() const { return false; }
     virtual bool isSVGInlineFlowBox() const { return false; }
@@ skipping 175 matching lines @@
     FloatPoint flipForWritingMode(const FloatPoint&) const;
     void flipForWritingMode(LayoutRect&) const;
     LayoutPoint flipForWritingMode(const LayoutPoint&) const;
 
     bool knownToHaveNoOverflow() const { return m_bitfields.knownToHaveNoOverflow(); }
     void clearKnownToHaveNoOverflow();
 
     bool dirOverride() const { return m_bitfields.dirOverride(); }
     void setDirOverride(bool dirOverride) { m_bitfields.setDirOverride(dirOverride); }
 
-    DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
     // Invalidate display item clients in the whole sub inline box tree.
     void invalidateDisplayItemClientsRecursively();
 
 #define ADD_BOOLEAN_BITFIELD(name, Name) \
     private:\
     unsigned m_##name : 1;\
     public:\
     bool name() const { return m_##name; }\
     void set##Name(bool name) { m_##name = name; }\
 
@@ skipping 139 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineBox*);
 void showLineTree(const blink::InlineBox*);
 #endif
 
 #endif // InlineBox_h