Fix bug of animated table col/section/row background

third_party/WebKit/Source/core/layout/LayoutTableBoxComponent.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 LayoutTableBoxComponent_h
 #define LayoutTableBoxComponent_h
 
 #include "core/CoreExport.h"
 #include "core/layout/LayoutBox.h"
 
 namespace blink {
 
 class LayoutTable;
 
 // Common super class for LayoutTableCol, LayoutTableSection and LayoutTableRow.
 class CORE_EXPORT LayoutTableBoxComponent : public LayoutBox {
  public:
-  bool backgroundChangedSinceLastPaintInvalidation() const {
-    return m_backgroundChangedSinceLastPaintInvalidation;
-  }
-  void clearBackgroundChangedSinceLastPaintInvalidation() {
-    m_backgroundChangedSinceLastPaintInvalidation = false;
-  }
   static bool doCellsHaveDirtyWidth(const LayoutObject& tablePart,
                                     const LayoutTable&,
                                     const StyleDifference&,
                                     const ComputedStyle& oldStyle);
 
  protected:
-  explicit LayoutTableBoxComponent(Element* element)
-      : LayoutBox(element),
-        m_backgroundChangedSinceLastPaintInvalidation(false) {}
+  explicit LayoutTableBoxComponent(Element* element) : LayoutBox(element) {}
 
   const LayoutObjectChildList* children() const { return &m_children; }
   LayoutObjectChildList* children() { return &m_children; }
 
   LayoutObject* firstChild() const {
     DCHECK(children() == virtualChildren());
     return children()->firstChild();
   }
   LayoutObject* lastChild() const {
     DCHECK(children() == virtualChildren());
     return children()->lastChild();
   }
 
-  void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
-  void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
-
-  void clearPaintInvalidationFlags() override {
-    LayoutBox::clearPaintInvalidationFlags();
-    m_backgroundChangedSinceLastPaintInvalidation = false;
-  }
-
-#if ENABLE(ASSERT)
-  bool paintInvalidationStateIsDirty() const override {
-    return m_backgroundChangedSinceLastPaintInvalidation ||
-           LayoutBox::paintInvalidationStateIsDirty();
-  }
-#endif
-
  private:
   // If you have a LayoutTableBoxComponent, use firstChild or lastChild instead.
   void slowFirstChild() const = delete;
   void slowLastChild() const = delete;
 
   LayoutObjectChildList* virtualChildren() override { return children(); }
   const LayoutObjectChildList* virtualChildren() const override {
     return children();
   }
 
   LayoutObjectChildList m_children;
-  bool m_backgroundChangedSinceLastPaintInvalidation;
 };
 
 }  // namespace blink
 
 #endif  // LayoutTableBoxComponent_h