[New Multicolumn] Intrinsic/preferred logical width calculation for spanners.

Source/core/rendering/RenderMultiColumnSpannerPlaceholder.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/RenderMultiColumnSpannerPlaceholder.h"
 
 namespace blink {
 
 static void copyMarginProperties(RenderStyle* placeholderStyle, const RenderStyle* spannerStyle)
@@ skipping 35 matching lines @@
     if (m_rendererInFlowThread)
         m_rendererInFlowThread->clearSpannerPlaceholder();
     RenderBox::willBeRemovedFromTree();
 }
 
 bool RenderMultiColumnSpannerPlaceholder::needsPreferredWidthsRecalculation() const
 {
     return m_rendererInFlowThread->needsPreferredWidthsRecalculation();
 }
 
+LayoutUnit RenderMultiColumnSpannerPlaceholder::minPreferredLogicalWidth() const
+{
+    return m_rendererInFlowThread->minPreferredLogicalWidth();
+}
+
+LayoutUnit RenderMultiColumnSpannerPlaceholder::maxPreferredLogicalWidth() const
+{
+    return m_rendererInFlowThread->maxPreferredLogicalWidth();
+}
+
 void RenderMultiColumnSpannerPlaceholder::layout()
 {
     ASSERT(needsLayout());
 
     // Lay out the actual column-span:all element.
     m_rendererInFlowThread->layoutIfNeeded();
 
     // The spanner has now been laid out, so its height is known. Time to update the placeholder's
     // height as well, so that we take up the correct amount of space in the multicol container.
     updateLogicalHeight();
@@ skipping 32 matching lines @@
 {
     return !m_rendererInFlowThread->hasSelfPaintingLayer() && m_rendererInFlowThread->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, action);
 }
 
 const char* RenderMultiColumnSpannerPlaceholder::renderName() const
 {
     return "RenderMultiColumnSpannerPlaceholder";
 }
 
 }