| Index: third_party/WebKit/Source/core/layout/LayoutBox.h | 
| diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h | 
| index aca950dfdaef5226338fab9bb65e51c04b10e851..51be19511ac1836cba6b89b1b5d0aa864b942dc8 100644 | 
| --- a/third_party/WebKit/Source/core/layout/LayoutBox.h | 
| +++ b/third_party/WebKit/Source/core/layout/LayoutBox.h | 
| @@ -1669,7 +1669,7 @@ inline LayoutBox* LayoutBox::lastChildBox() const { | 
| } | 
|  | 
| inline LayoutBox* LayoutBox::previousSiblingMultiColumnBox() const { | 
| -  ASSERT(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet()); | 
| +  DCHECK(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet()); | 
| LayoutBox* previousBox = previousSiblingBox(); | 
| if (previousBox->isLayoutFlowThread()) | 
| return nullptr; | 
| @@ -1677,13 +1677,13 @@ inline LayoutBox* LayoutBox::previousSiblingMultiColumnBox() const { | 
| } | 
|  | 
| inline LayoutBox* LayoutBox::nextSiblingMultiColumnBox() const { | 
| -  ASSERT(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet()); | 
| +  DCHECK(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet()); | 
| return nextSiblingBox(); | 
| } | 
|  | 
| inline void LayoutBox::setInlineBoxWrapper(InlineBox* boxWrapper) { | 
| if (boxWrapper) { | 
| -    ASSERT(!m_inlineBoxWrapper); | 
| +    DCHECK(!m_inlineBoxWrapper); | 
| // m_inlineBoxWrapper should already be nullptr. Deleting it is a safeguard | 
| // against security issues. Otherwise, there will two line box wrappers | 
| // keeping the reference to this layoutObject, and only one will be notified | 
|  |