[New Multicolumn] Let a spanner's containing block be the multicol container.

Source/core/rendering/RenderMultiColumnSpannerSet.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-#include "core/rendering/RenderMultiColumnSpannerSet.h"
-
-namespace blink {
-
-RenderMultiColumnSpannerSet* RenderMultiColumnSpannerSet::createAnonymous(RenderMultiColumnFlowThread* flowThread, RenderStyle* parentStyle, RenderBox* rendererInFlowThread)
-{
-    RenderMultiColumnSpannerSet* newSpanner = new RenderMultiColumnSpannerSet(flowThread, rendererInFlowThread);
-    Document& document = flowThread->document();
-    newSpanner->setDocumentForAnonymous(&document);
-    RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parentStyle, BLOCK);
-    newSpanner->setStyle(newStyle);
-    return newSpanner;
-}
-
-RenderMultiColumnSpannerSet::RenderMultiColumnSpannerSet(RenderMultiColumnFlowThread* flowThread, RenderBox* rendererInFlowThread)
-    : RenderMultiColumnSet(flowThread)
-    , m_rendererInFlowThread(rendererInFlowThread)
-{
-}
-
-bool RenderMultiColumnSpannerSet::recalculateColumnHeight(BalancedHeightCalculation calculationMode)
-{
-    return false;
-}
-
-const char* RenderMultiColumnSpannerSet::renderName() const
-{
-    return "RenderMultiColumnSpannerSet";
-}
-
-}