Remove the old multicol implementation.

Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1477 matching lines @@
         return;
 
     if (paintInvalidationState && paintInvalidationState->canMapToContainer(paintInvalidationContainer)) {
         rect.move(paintInvalidationState->paintOffset());
         if (paintInvalidationState->isClipped())
             rect.intersect(paintInvalidationState->clipRect());
         return;
     }
 
     if (LayoutObject* o = parent()) {
-        if (o->isLayoutBlockFlow()) {
-            LayoutBlock* cb = toLayoutBlock(o);
-            if (cb->hasColumns())
-                cb->adjustRectForColumns(rect);
-        }
-
         if (o->hasOverflowClip()) {
             LayoutBox* boxParent = toLayoutBox(o);
             boxParent->applyCachedClipAndScrollOffsetForPaintInvalidation(rect);
             if (rect.isEmpty())
                 return;
         }
 
         o->mapRectToPaintInvalidationBacking(paintInvalidationContainer, rect, paintInvalidationState);
     }
 }
@@ skipping 450 matching lines @@
         if (!child->isAnonymous() || child->style()->styleType() != NOPSEUDO)
             continue;
 
         if (blockChildrenOnly && !child->isLayoutBlock())
             continue;
 
         if (child->isLayoutFullScreen() || child->isLayoutFullScreenPlaceholder())
             continue;
 
         RefPtr<ComputedStyle> newStyle = ComputedStyle::createAnonymousStyleWithDisplay(styleRef(), child->style()->display());
-        if (!RuntimeEnabledFeatures::regionBasedColumnsEnabled()) {
-            if (style()->specifiesColumns()) {
-                if (child->style()->specifiesColumns())
-                    newStyle->inheritColumnPropertiesFrom(styleRef());
-                if (child->style()->columnSpan())
-                    newStyle->setColumnSpan(ColumnSpanAll);
-            }
-        }
 
         // Preserve the position style of anonymous block continuations as they can have relative position when
         // they contain block descendants of relative positioned inlines.
         if (child->isRelPositioned() && toLayoutBlock(child)->isAnonymousBlockContinuation())
             newStyle->setPosition(child->style()->position());
 
         updateAnonymousChildStyle(*child, *newStyle);
 
         child->setStyle(newStyle.release());
     }
@@ skipping 70 matching lines @@
         return;
 
     LayoutObject* o = parent();
     if (!o)
         return;
 
     // FIXME: this should call offsetFromContainer to share code, but I'm not sure it's ever called.
     LayoutPoint centerPoint = roundedLayoutPoint(transformState.mappedPoint());
     if (mode & ApplyContainerFlip && o->isBox()) {
         if (o->style()->isFlippedBlocksWritingMode())
-            transformState.move(toLayoutBox(o)->flipForWritingModeIncludingColumns(roundedLayoutPoint(transformState.mappedPoint())) - centerPoint);
+            transformState.move(toLayoutBox(o)->flipForWritingMode(roundedLayoutPoint(transformState.mappedPoint())) - centerPoint);
         mode &= ~ApplyContainerFlip;
     }
 
     transformState.move(o->columnOffset(roundedLayoutPoint(transformState.mappedPoint())));
 
     if (o->hasOverflowClip())
         transformState.move(-toLayoutBox(o)->scrolledContentOffset());
 
     o->mapLocalToContainer(paintInvalidationContainer, transformState, mode, wasFixed, paintInvalidationState);
 }
 
 const LayoutObject* LayoutObject::pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap& geometryMap) const
 {
     ASSERT_UNUSED(ancestorToStopAt, ancestorToStopAt != this);
 
     LayoutObject* container = parent();
     if (!container)
         return 0;
 
     // FIXME: this should call offsetFromContainer to share code, but I'm not sure it's ever called.
     LayoutSize offset;
     if (container->hasOverflowClip())
         offset = -LayoutSize(toLayoutBox(container)->scrolledContentOffset());
 
-    geometryMap.push(this, offset, hasColumns());
+    geometryMap.push(this, offset);
 
     return container;
 }
 
 void LayoutObject::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
 {
     LayoutObject* o = parent();
     if (o) {
         o->mapAbsoluteToLocalPoint(mode, transformState);
         if (o->hasOverflowClip())
@@ skipping 72 matching lines @@
 LayoutSize LayoutObject::offsetFromContainer(const LayoutObject* o, const LayoutPoint& point, bool* offsetDependsOnPoint) const
 {
     ASSERT(o == container());
 
     LayoutSize offset = o->columnOffset(point);
 
     if (o->hasOverflowClip())
         offset -= toLayoutBox(o)->scrolledContentOffset();
 
     if (offsetDependsOnPoint)
-        *offsetDependsOnPoint = hasColumns() || o->isLayoutFlowThread();
+        *offsetDependsOnPoint = o->isLayoutFlowThread();
 
     return offset;
 }
 
 LayoutSize LayoutObject::offsetFromAncestorContainer(const LayoutObject* container) const
 {
     if (container == this)
         return LayoutSize();
 
     LayoutSize offset;
@@ skipping 1104 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         fprintf(stderr, "Cannot showLayoutTree. Root is (nil)\n");
     }
 }
 
 #endif