*** DO NOT LAND *** Measure the size and complexity of the old multicol implementation.

Source/core/rendering/RenderView.h

Index: Source/core/rendering/RenderView.h
diff --git a/Source/core/rendering/RenderView.h b/Source/core/rendering/RenderView.h
index be945cd13d60345bb06100078f15989917d64852..6a6f22c6c1721c101fc273f7a543ccfb36e58b98 100644
--- a/Source/core/rendering/RenderView.h
+++ b/Source/core/rendering/RenderView.h
@@ -61,8 +61,6 @@ public:
 
     virtual bool supportsPartialLayout() const OVERRIDE { return true; }
 
-    virtual LayoutUnit availableLogicalHeight(AvailableLogicalHeightType) const OVERRIDE;
-
     // The same as the FrameView's layoutHeight/layoutWidth but with null check guards.
     int viewHeight(ScrollableArea::IncludeScrollbarsInRect scrollbarInclusion = ScrollableArea::ExcludeScrollbars) const;
     int viewWidth(ScrollableArea::IncludeScrollbarsInRect scrollbarInclusion = ScrollableArea::ExcludeScrollbars) const;
@@ -209,22 +207,19 @@ private:
 
     void initializeLayoutState(LayoutState&);
 
-    virtual void calcColumnWidth() OVERRIDE;
-    virtual ColumnInfo::PaginationUnit paginationUnit() const OVERRIDE;
-
     bool shouldRepaint(const LayoutRect&) const;
 
     // These functions may only be accessed by LayoutStateMaintainer.
-    bool pushLayoutState(RenderBox* renderer, const LayoutSize& offset, LayoutUnit pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0)
+    bool pushLayoutState(RenderBox* renderer, const LayoutSize& offset, LayoutUnit pageHeight = 0, bool pageHeightChanged = false)
     {
         // We push LayoutState even if layoutState is disabled because it stores layoutDelta too.
-        if (!doingFullRepaint() || m_layoutState->isPaginated() || renderer->hasColumns() || renderer->flowThreadContainingBlock()
+        if (!doingFullRepaint() || m_layoutState->isPaginated() || renderer->flowThreadContainingBlock()
             || m_layoutState->lineGrid() || (renderer->style()->lineGrid() != RenderStyle::initialLineGrid() && renderer->isRenderBlockFlow())
             || (renderer->isRenderBlock() && toRenderBlock(renderer)->shapeInsideInfo())
             || (m_layoutState->shapeInsideInfo() && renderer->isRenderBlock() && !toRenderBlock(renderer)->allowsShapeInsideInfoSharing(m_layoutState->shapeInsideInfo()->owner()))
             ) {
             pushLayoutStateForCurrentFlowThread(renderer);
-            m_layoutState = new LayoutState(m_layoutState, renderer, offset, pageHeight, pageHeightChanged, colInfo);
+            m_layoutState = new LayoutState(m_layoutState, renderer, offset, pageHeight, pageHeightChanged);
             return true;
         }
         return false;
@@ -293,14 +288,14 @@ class LayoutStateMaintainer {
     WTF_MAKE_NONCOPYABLE(LayoutStateMaintainer);
 public:
     // ctor to push now
-    LayoutStateMaintainer(RenderView* view, RenderBox* root, LayoutSize offset, bool disableState = false, LayoutUnit pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0)
+    LayoutStateMaintainer(RenderView* view, RenderBox* root, LayoutSize offset, bool disableState = false, LayoutUnit pageHeight = 0, bool pageHeightChanged = false)
         : m_view(view)
         , m_disabled(disableState)
         , m_didStart(false)
         , m_didEnd(false)
         , m_didCreateLayoutState(false)
     {
-        push(root, offset, pageHeight, pageHeightChanged, colInfo);
+        push(root, offset, pageHeight, pageHeightChanged);
     }
 
     // ctor to maybe push later
@@ -318,11 +313,11 @@ public:
         ASSERT(m_didStart == m_didEnd);   // if this fires, it means that someone did a push(), but forgot to pop().
     }
 
-    void push(RenderBox* root, LayoutSize offset, LayoutUnit pageHeight = 0, bool pageHeightChanged = false, ColumnInfo* colInfo = 0)
+    void push(RenderBox* root, LayoutSize offset, LayoutUnit pageHeight = 0, bool pageHeightChanged = false)
     {
         ASSERT(!m_didStart);
         // We push state even if disabled, because we still need to store layoutDelta
-        m_didCreateLayoutState = m_view->pushLayoutState(root, offset, pageHeight, pageHeightChanged, colInfo);
+        m_didCreateLayoutState = m_view->pushLayoutState(root, offset, pageHeight, pageHeightChanged);
         if (m_disabled && m_didCreateLayoutState)
             m_view->disableLayoutState();
         m_didStart = true;