| Index: third_party/WebKit/Source/core/layout/LayoutFrameSet.h | 
| diff --git a/third_party/WebKit/Source/core/layout/LayoutFrameSet.h b/third_party/WebKit/Source/core/layout/LayoutFrameSet.h | 
| index 5751f4ce0393b7dfde8b6cc58dcecd04755681fb..869a37dd789d663d901faf60cb0c205bef80e035 100644 | 
| --- a/third_party/WebKit/Source/core/layout/LayoutFrameSet.h | 
| +++ b/third_party/WebKit/Source/core/layout/LayoutFrameSet.h | 
| @@ -62,11 +62,11 @@ class LayoutFrameSet final : public LayoutBox { | 
| ~LayoutFrameSet() override; | 
|  | 
| LayoutObject* firstChild() const { | 
| -    ASSERT(children() == virtualChildren()); | 
| +    DCHECK_EQ(children(), virtualChildren()); | 
| return children()->firstChild(); | 
| } | 
| LayoutObject* lastChild() const { | 
| -    ASSERT(children() == virtualChildren()); | 
| +    DCHECK_EQ(children(), virtualChildren()); | 
| return children()->lastChild(); | 
| } | 
|  | 
|  |