| Index: Source/core/frame/UseCounter.h
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| diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h
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| index e0cf0ea248d41c57968ef8542e1caa5560adadd8..d386bb1877b0559af3c96540a3916510a4c51f58 100644
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| --- a/Source/core/frame/UseCounter.h
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| +++ b/Source/core/frame/UseCounter.h
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| @@ -813,6 +813,10 @@ public:
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|          LinkRelPrerender = 918,
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|          LinkRelNext = 919,
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|          PrefixedPerformanceResourceTimingBufferFull = 920,
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| +        CSSValuePrefixedMinContent = 921,
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| +        CSSValuePrefixedMaxContent = 922,
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| +        CSSValuePrefixedFitContent = 923,
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| +        CSSValuePrefixedFillAvailable = 924,
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|  
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|          // Add new features immediately above this line. Don't change assigned
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|          // numbers of any item, and don't reuse removed slots.
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| 
 |