Clean up GraphicsLayerPaintInfo to remove unused or unnecessary fields.

Source/core/rendering/RenderText.h

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2009, 2013 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.
  *
@@ skipping 102 matching lines @@
 
     virtual bool canBeSelectionLeaf() const OVERRIDE { return true; }
     virtual void setSelectionState(SelectionState s) OVERRIDE FINAL;
     virtual LayoutRect selectionRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, bool clipToVisibleContent = true) OVERRIDE;
     virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0) OVERRIDE;
 
     LayoutUnit marginLeft() const { return minimumValueForLength(style()->marginLeft(), 0); }
     LayoutUnit marginRight() const { return minimumValueForLength(style()->marginRight(), 0); }
 
     virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const OVERRIDE FINAL;
+    virtual const RenderLayerModelObject* containerForPaintInvalidation() const OVERRIDE;
 
     InlineTextBox* firstTextBox() const { return m_firstTextBox; }
     InlineTextBox* lastTextBox() const { return m_lastTextBox; }
 
     virtual int caretMinOffset() const OVERRIDE;
     virtual int caretMaxOffset() const OVERRIDE;
     unsigned renderedTextLength() const;
 
     virtual int previousOffset(int current) const OVERRIDE FINAL;
     virtual int previousOffsetForBackwardDeletion(int current) const OVERRIDE FINAL;
@@ skipping 21 matching lines @@
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
 
     virtual void setTextInternal(PassRefPtr<StringImpl>);
     virtual UChar previousCharacter() const;
 
     virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE;
 
     virtual InlineTextBox* createTextBox(); // Subclassed by SVG.
 
 private:
+    // RenderText objects don't know how to invalidate paint for themselves, since they don't know how to compute their bounds. Instead, they
+    // invalidate paint for the containing block or layer, as computed by this method.
+    const RenderObject* containingObjectForPaintInvalidation() const;
+
     void computePreferredLogicalWidths(float leadWidth);
     void computePreferredLogicalWidths(float leadWidth, HashSet<const SimpleFontData*>& fallbackFonts, GlyphOverflow&);
 
     bool computeCanUseSimpleFontCodePath() const;
 
     // Make length() private so that callers that have a RenderText*
     // will use the more efficient textLength() instead, while
     // callers with a RenderObject* can continue to use length().
     virtual unsigned length() const OVERRIDE FINAL { return textLength(); }
 
@@ skipping 62 matching lines @@
 inline RenderText* Text::renderer() const
 {
     return toRenderText(CharacterData::renderer());
 }
 
 void applyTextTransform(const RenderStyle*, String&, UChar);
 
 } // namespace blink
 
 #endif // RenderText_h