[New Multicolumn] Support for paged overflow. (By mstensho).

Source/core/rendering/RenderMultiColumnFlowThread.cpp

Index: Source/core/rendering/RenderMultiColumnFlowThread.cpp
diff --git a/Source/core/rendering/RenderMultiColumnFlowThread.cpp b/Source/core/rendering/RenderMultiColumnFlowThread.cpp
index d09b178570c2af3ac2a5ba2a8004a7c25cb5ae8d..6d913d0b316c5b975ac98498d8e7ac208c2fd586 100644
--- a/Source/core/rendering/RenderMultiColumnFlowThread.cpp
+++ b/Source/core/rendering/RenderMultiColumnFlowThread.cpp
@@ -35,6 +35,7 @@ RenderMultiColumnFlowThread::RenderMultiColumnFlowThread()
     , m_columnHeightAvailable(0)
     , m_inBalancingPass(false)
     , m_needsColumnHeightsRecalculation(false)
+    , m_progressionIsInline(true)
 {
     setFlowThreadState(InsideInFlowThread);
 }
@@ -169,7 +170,7 @@ void RenderMultiColumnFlowThread::layoutColumns(bool relayoutChildren, SubtreeLa
     }
 
     invalidateRegions();
-    m_needsColumnHeightsRecalculation = requiresBalancing();
+    m_needsColumnHeightsRecalculation = heightIsAuto();
     layout();
 }