| Index: Source/core/frame/UseCounter.cpp | 
| diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp | 
| index 91eeae06346da37f909bfe589f84942849756010..11b20a64ff1e309bf290c99e430078ed88b606d3 100644 | 
| --- a/Source/core/frame/UseCounter.cpp | 
| +++ b/Source/core/frame/UseCounter.cpp | 
| @@ -710,6 +710,9 @@ String UseCounter::deprecationMessage(Feature feature) | 
| case PrefixedCancelRequestAnimationFrame: | 
| return "'webkitCancelRequestAnimationFrame' is vendor-specific. Please use the standard 'cancelAnimationFrame' instead."; | 
|  | 
| +    case HTMLHtmlElementManifest: | 
| +        return "'HTMLHtmlElement.manifest' is deprecated. The manifest attribute only has an effect during the early stages of document load."; | 
| + | 
| // Features that aren't deprecated don't have a deprecation message. | 
| default: | 
| return String(); | 
|  |