[LayoutNG] Initial support for multicol, introducing NGBlockBreakToken.

third_party/WebKit/Source/core/style/StyleMultiColData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef StyleMultiColData_h
 #define StyleMultiColData_h
 
+#include "core/CoreExport.h"
 #include "core/style/BorderValue.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 // CSS3 Multi Column Layout
 
-class StyleMultiColData : public RefCounted<StyleMultiColData> {
+class CORE_EXPORT StyleMultiColData : public RefCounted<StyleMultiColData> {
  public:
   static PassRefPtr<StyleMultiColData> create() {
     return adoptRef(new StyleMultiColData);
   }
   PassRefPtr<StyleMultiColData> copy() const {
     return adoptRef(new StyleMultiColData(*this));
   }
 
   bool operator==(const StyleMultiColData&) const;
   bool operator!=(const StyleMultiColData& o) const { return !(*this == o); }
@@ skipping 18 matching lines @@
   unsigned m_columnSpan : 1;
 
  private:
   StyleMultiColData();
   StyleMultiColData(const StyleMultiColData&);
 };
 
 }  // namespace blink
 
 #endif  // StyleMultiColData_h