Remove some unused paint invalidation members from RenderObject.

sky/engine/core/rendering/line/LineLayoutState.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2014 Adobe Systems Incorporated. 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 15 matching lines @@
 
 #include "sky/engine/core/rendering/RenderBlockFlow.h"
 #include "sky/engine/platform/geometry/LayoutRect.h"
 
 namespace blink {
 
 // Like LayoutState for layout(), LineLayoutState keeps track of global information
 // during an entire linebox tree layout pass (aka RenderParagraph::layoutChildren).
 class LineLayoutState {
 public:
-    LineLayoutState(bool fullLayout, LayoutUnit& paintInvalidationLogicalTop, LayoutUnit& paintInvalidationLogicalBottom)
+    LineLayoutState(bool fullLayout)
         : m_lastFloat(0)
         , m_endLine(0)
         , m_floatIndex(0)
         , m_endLineLogicalTop(0)
         , m_endLineMatched(false)
         , m_checkForFloatsFromLastLine(false)
         , m_hasInlineChild(false)
         , m_isFullLayout(fullLayout)
-        , m_paintInvalidationLogicalTop(paintInvalidationLogicalTop)
-        , m_paintInvalidationLogicalBottom(paintInvalidationLogicalBottom)
         , m_adjustedLogicalLineTop(0)
-        , m_usesPaintInvalidationBounds(false)
     { }
 
     void markForFullLayout() { m_isFullLayout = true; }
     bool isFullLayout() const { return m_isFullLayout; }
 
-    bool usesPaintInvalidationBounds() const { return m_usesPaintInvalidationBounds; }
-
-    void setPaintInvalidationRange(LayoutUnit logicalHeight)
-    {
-        m_usesPaintInvalidationBounds = true;
-        m_paintInvalidationLogicalTop = m_paintInvalidationLogicalBottom = logicalHeight;
-    }
-
-    void updatePaintInvalidationRangeFromBox(RootInlineBox* box, LayoutUnit paginationDelta = 0)
-    {
-        m_usesPaintInvalidationBounds = true;
-        m_paintInvalidationLogicalTop = std::min(m_paintInvalidationLogicalTop, box->logicalTopVisualOverflow() + std::min<LayoutUnit>(paginationDelta, 0));
-        m_paintInvalidationLogicalBottom = std::max(m_paintInvalidationLogicalBottom, box->logicalBottomVisualOverflow() + std::max<LayoutUnit>(paginationDelta, 0));
-    }
-
     bool endLineMatched() const { return m_endLineMatched; }
     void setEndLineMatched(bool endLineMatched) { m_endLineMatched = endLineMatched; }
 
     bool checkForFloatsFromLastLine() const { return m_checkForFloatsFromLastLine; }
     void setCheckForFloatsFromLastLine(bool check) { m_checkForFloatsFromLastLine = check; }
 
     bool hasInlineChild() const { return m_hasInlineChild; }
     void setHasInlineChild(bool hasInlineChild) { m_hasInlineChild = hasInlineChild; }
 
     LineInfo& lineInfo() { return m_lineInfo; }
@@ skipping 24 matching lines @@
     unsigned m_floatIndex;
     LayoutUnit m_endLineLogicalTop;
     bool m_endLineMatched;
     bool m_checkForFloatsFromLastLine;
     // Used as a performance optimization to avoid doing a full paint invalidation when our floats
     // change but we don't have any inline children.
     bool m_hasInlineChild;
 
     bool m_isFullLayout;
 
-    // FIXME: Should this be a range object instead of two ints?
-    LayoutUnit& m_paintInvalidationLogicalTop;
-    LayoutUnit& m_paintInvalidationLogicalBottom;
-
     LayoutUnit m_adjustedLogicalLineTop;
-
-    bool m_usesPaintInvalidationBounds;
 };
 
 }
 
 #endif  // SKY_ENGINE_CORE_RENDERING_LINE_LINELAYOUTSTATE_H_