Don't explicitly initialize LayoutUnit to 0.

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

 /*
  * Copyright (C) 2012 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/MultiColumnFragmentainerGroup.h"
 #include "core/layout/ViewFragmentationContext.h"
 
 namespace blink {
 
 LayoutMultiColumnFlowThread::LayoutMultiColumnFlowThread()
     : m_lastSetWorkedOn(nullptr)
     , m_columnCount(1)
-    , m_columnHeightAvailable(0)
     , m_columnHeightsChanged(false)
     , m_progressionIsInline(true)
     , m_isBeingEvacuated(false)
 {
     setIsInsideFlowThread(true);
 }
 
 LayoutMultiColumnFlowThread::~LayoutMultiColumnFlowThread()
 {
 }
@@ skipping 992 matching lines @@
         }
         if (canContainSpannerInParentFragmentationContext(*object))
             next = object->nextInPreOrder(&root);
         else
             next = object->nextInPreOrderAfterChildren(&root);
     }
     return true;
 }
 
 } // namespace blink