| Index: Source/core/frame/UseCounter.h | 
| diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h | 
| index 8ccc650d9b772f4a261c5211b52998afef0ff801..10c08f7817b868f84b9c6bcb9c4382a2e576512d 100644 | 
| --- a/Source/core/frame/UseCounter.h | 
| +++ b/Source/core/frame/UseCounter.h | 
| @@ -542,6 +542,7 @@ public: | 
| SVGAnimatedTransformListBaseVal = 570, | 
| QuotedAnimationName = 571, | 
| QuotedKeyframesRule = 572, | 
| +        SrcsetDroppedCandidate = 573, | 
|  | 
| // Add new features immediately above this line. Don't change assigned | 
| // numbers of any item, and don't reuse removed slots. | 
|  |