Untangle multicol coordinate space conversion from offsetFromContainer().

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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
@@ skipping 1689 matching lines @@
         // If this box has a transform, it acts as a fixed position container for fixed descendants,
         // and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
         mode &= ~IsFixed;
     } else if (isFixedPos) {
         mode |= IsFixed;
     }
 
     LayoutBoxModelObject::mapAncestorToLocal(ancestor, transformState, mode);
 }
 
-LayoutSize LayoutBox::offsetFromContainer(const LayoutObject* o, const LayoutPoint& point, bool* offsetDependsOnPoint) const
+LayoutSize LayoutBox::offsetFromContainer(const LayoutObject* o) const
 {
     ASSERT(o == container());
 
     LayoutSize offset;
     if (isInFlowPositioned())
         offset += offsetForInFlowPosition();
 
     offset += topLeftLocationOffset();
-    if (o->isLayoutFlowThread()) {
-        // So far the point has been in flow thread coordinates (i.e. as if everything in
-        // the fragmentation context lived in one tall single column). Convert it to a
-        // visual point now.
-        LayoutPoint pointInContainer = point + offset;
-        offset += o->columnOffset(pointInContainer);
-        if (offsetDependsOnPoint)
-            *offsetDependsOnPoint = true;
-    }
 
     if (o->hasOverflowClip())
         offset -= toLayoutBox(o)->scrolledContentOffset();
 
     if (style()->position() == AbsolutePosition && o->isInFlowPositioned() && o->isLayoutInline())
         offset += toLayoutInline(o)->offsetForInFlowPositionedInline(*this);
 
     return offset;
 }
 
@@ skipping 2975 matching lines @@
 
 void LayoutBox::clearPercentHeightDescendants()
 {
     for (LayoutObject* curr = slowFirstChild(); curr; curr = curr->nextInPreOrder(this)) {
         if (curr->isBox())
             toLayoutBox(curr)->removeFromPercentHeightContainer();
     }
 }
 
 } // namespace blink