| Index: Source/core/frame/UseCounter.cpp
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| diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
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| index 5b074135fc1ddad58114048fe8739e5407794e9b..f41b562253bfe83f2787b0d2266a08055708b66d 100644
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| --- a/Source/core/frame/UseCounter.cpp
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| +++ b/Source/core/frame/UseCounter.cpp
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| @@ -788,6 +788,12 @@ String UseCounter::deprecationMessage(Feature feature)
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|      case PictureSourceSrc:
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|          return "<source src> with a <picture> parent is invalid and therefore ignored. Please use <source srcset> instead.";
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|  
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| +    case XHRProgressEventPosition:
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| +        return "The XMLHttpRequest progress event property 'position' is deprecated. Please use 'loaded' instead.";
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| +
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| +    case XHRProgressEventTotalSize:
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| +        return "The XMLHttpRequest progress event property 'totalSize' is deprecated. Please use 'total' instead.";
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| +
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|      // Features that aren't deprecated don't have a deprecation message.
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|      default:
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|          return String();
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| 
 |