Remove the old multicol implementation.

Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google 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
@@ skipping 389 matching lines @@
     inline bool isAfterContent() const;
     inline bool isBeforeOrAfterContent() const;
     static inline bool isAfterContent(const LayoutObject* obj) { return obj && obj->isAfterContent(); }
 
     bool hasCounterNodeMap() const { return m_bitfields.hasCounterNodeMap(); }
     void setHasCounterNodeMap(bool hasCounterNodeMap) { m_bitfields.setHasCounterNodeMap(hasCounterNodeMap); }
     bool everHadLayout() const { return m_bitfields.everHadLayout(); }
 
     bool childrenInline() const { return m_bitfields.childrenInline(); }
     void setChildrenInline(bool b) { m_bitfields.setChildrenInline(b); }
-    bool hasColumns() const { return m_bitfields.hasColumns(); }
-    void setHasColumns(bool b = true) { m_bitfields.setHasColumns(b); }
 
     bool alwaysCreateLineBoxesForLayoutInline() const
     {
         ASSERT(isLayoutInline());
         return m_bitfields.alwaysCreateLineBoxesForLayoutInline();
     }
     void setAlwaysCreateLineBoxesForLayoutInline(bool alwaysCreateLineBoxes)
     {
         ASSERT(isLayoutInline());
         m_bitfields.setAlwaysCreateLineBoxesForLayoutInline(alwaysCreateLineBoxes);
@@ skipping 625 matching lines @@
     bool shouldCheckForPaintInvalidation(const PaintInvalidationState& paintInvalidationState) const
     {
         return paintInvalidationState.forceCheckForPaintInvalidation() || shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState();
     }
 
     bool shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState() const
     {
         return layoutDidGetCalledSinceLastFrame() || mayNeedPaintInvalidation() || shouldDoFullPaintInvalidation() || shouldInvalidateSelection();
     }
 
-    virtual bool supportsPaintInvalidationStateCachedOffsets() const { return !hasColumns() && !hasTransformRelatedProperty() && !hasReflection() && !style()->isFlippedBlocksWritingMode(); }
+    virtual bool supportsPaintInvalidationStateCachedOffsets() const { return !hasTransformRelatedProperty() && !hasReflection() && !style()->isFlippedBlocksWritingMode(); }
 
     virtual LayoutRect viewRect() const;
 
     DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
 
     void invalidateDisplayItemClient(const DisplayItemClientWrapper&) const;
     void invalidateDisplayItemClientForNonCompositingDescendants() const { invalidateDisplayItemClientForNonCompositingDescendantsOf(*this); }
     // A normal object should use invalidateDisplayItemClientForNonCompositingDescendants()
     // to invalidate its descendants which are painted on the same backing. However, for
     // an object (e.g. LayoutScrollbarPart, custom scroll corner, custom resizer) which is
@@ skipping 249 matching lines @@
             , m_hasCounterNodeMap(false)
             , m_everHadLayout(false)
             , m_ancestorLineBoxDirty(false)
             , m_layoutDidGetCalledSinceLastFrame(false)
             , m_hasPendingResourceUpdate(false)
             , m_isInsideFlowThread(false)
             , m_subtreeChangeListenerRegistered(false)
             , m_notifiedOfSubtreeChange(false)
             , m_consumesSubtreeChangeNotification(false)
             , m_childrenInline(false)
-            , m_hasColumns(false)
             , m_alwaysCreateLineBoxesForLayoutInline(false)
             , m_lastBoxDecorationBackgroundObscured(false)
             , m_positionedState(IsStaticallyPositioned)
             , m_selectionState(SelectionNone)
             , m_boxDecorationBackgroundState(NoBoxDecorationBackground)
             , m_fullPaintInvalidationReason(PaintInvalidationNone)
         {
         }
 
-        // 32 bits have been used in the first word, and 17 in the second.
+        // 32 bits have been used in the first word, and 16 in the second.
         ADD_BOOLEAN_BITFIELD(selfNeedsLayout, SelfNeedsLayout);
         ADD_BOOLEAN_BITFIELD(shouldInvalidateOverflowForPaint, ShouldInvalidateOverflowForPaint);
         ADD_BOOLEAN_BITFIELD(mayNeedPaintInvalidation, MayNeedPaintInvalidation);
         ADD_BOOLEAN_BITFIELD(shouldInvalidateSelection, ShouldInvalidateSelection);
         ADD_BOOLEAN_BITFIELD(neededLayoutBecauseOfChildren, NeededLayoutBecauseOfChildren);
         ADD_BOOLEAN_BITFIELD(needsPositionedMovementLayout, NeedsPositionedMovementLayout);
         ADD_BOOLEAN_BITFIELD(normalChildNeedsLayout, NormalChildNeedsLayout);
         ADD_BOOLEAN_BITFIELD(posChildNeedsLayout, PosChildNeedsLayout);
         ADD_BOOLEAN_BITFIELD(needsSimplifiedNormalFlowLayout, NeedsSimplifiedNormalFlowLayout);
         ADD_BOOLEAN_BITFIELD(preferredLogicalWidthsDirty, PreferredLogicalWidthsDirty);
@@ skipping 23 matching lines @@
         ADD_BOOLEAN_BITFIELD(hasPendingResourceUpdate, HasPendingResourceUpdate);
 
         ADD_BOOLEAN_BITFIELD(isInsideFlowThread, IsInsideFlowThread);
 
         ADD_BOOLEAN_BITFIELD(subtreeChangeListenerRegistered, SubtreeChangeListenerRegistered);
         ADD_BOOLEAN_BITFIELD(notifiedOfSubtreeChange, NotifiedOfSubtreeChange);
         ADD_BOOLEAN_BITFIELD(consumesSubtreeChangeNotification, ConsumesSubtreeChangeNotification);
 
         // from LayoutBlock
         ADD_BOOLEAN_BITFIELD(childrenInline, ChildrenInline);
-        ADD_BOOLEAN_BITFIELD(hasColumns, HasColumns);
 
         // from LayoutInline
         ADD_BOOLEAN_BITFIELD(alwaysCreateLineBoxesForLayoutInline, AlwaysCreateLineBoxesForLayoutInline);
 
         // For slimming-paint.
         ADD_BOOLEAN_BITFIELD(lastBoxDecorationBackgroundObscured, LastBoxDecorationBackgroundObscured);
 
     private:
         unsigned m_positionedState : 2; // PositionedState
         unsigned m_selectionState : 3; // SelectionState
@@ skipping 274 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h