| Index: Source/core/rendering/RenderMultiColumnSpannerPlaceholder.h | 
| diff --git a/Source/core/rendering/RenderMultiColumnSpannerPlaceholder.h b/Source/core/rendering/RenderMultiColumnSpannerPlaceholder.h | 
| index 28173449687145e4c6cd709d7d4eaec633d5dfa6..28770c6b758403c88e54285f84509a6f8fe15ee0 100644 | 
| --- a/Source/core/rendering/RenderMultiColumnSpannerPlaceholder.h | 
| +++ b/Source/core/rendering/RenderMultiColumnSpannerPlaceholder.h | 
| @@ -24,6 +24,7 @@ public: | 
| RenderBox* rendererInFlowThread() const { return m_rendererInFlowThread; } | 
| void setRendererInFlowThread(RenderBox* renderer) { m_rendererInFlowThread = renderer; } | 
| void spannerWillBeRemoved(); | 
| +    void updateMarginProperties(); | 
|  | 
| protected: | 
| virtual void willBeRemovedFromTree() override; | 
|  |