| Index: Source/core/css/MediaQueryMatcher.cpp | 
| diff --git a/Source/core/css/MediaQueryMatcher.cpp b/Source/core/css/MediaQueryMatcher.cpp | 
| index 9051099e17cb8de74753b883d3def0c16395cab3..5e0c13f48da8f0f7904f652373eeb0267d34c329 100644 | 
| --- a/Source/core/css/MediaQueryMatcher.cpp | 
| +++ b/Source/core/css/MediaQueryMatcher.cpp | 
| @@ -101,7 +101,7 @@ bool MediaQueryMatcher::evaluate(const MediaQuerySet* media) | 
| PassRefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query) | 
| { | 
| if (!m_document) | 
| -        return 0; | 
| +        return nullptr; | 
|  | 
| RefPtr<MediaQuerySet> media = MediaQuerySet::create(query); | 
| // Add warning message to inspector whenever dpi/dpcm values are used for "screen" media. | 
|  |