Change nextHopProtocol to a ByteString (#281)

index.html

@@ -416,7 +416,7 @@ <h3>
           [Exposed=(Window,Worker)]
           interface PerformanceResourceTiming : PerformanceEntry {
               readonly attribute DOMString initiatorType;
-              readonly attribute DOMString nextHopProtocol;
+              readonly attribute ByteString nextHopProtocol;
               readonly attribute DOMHighResTimeStamp workerStart;
               readonly attribute DOMHighResTimeStamp redirectStart;
               readonly attribute DOMHighResTimeStamp redirectEnd;
@@ -592,11 +592,11 @@ <h3>
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>nextHopProtocol</dfn> getter steps are to [=/isomorphic
-          decode=] <a>this</a>'s <a data-for="PerformanceResourceTiming">timing
-          info</a>'s [=fetch timing info/final connection timing info=]'s
-          [=connection timing info/ALPN negotiated protocol=]. See
-          <a data-cite="FETCH#record-connection-timing-info">Recording
-          connection timing info</a> for more info.
+          decode=] <a>this</a>'s [=PerformanceResourceTiming/timing info=]'s
+          [=fetch timing info/final connection timing info=]'s [=connection
+          timing info/ALPN negotiated protocol=]. See <a data-cite=
+          "FETCH#record-connection-timing-info">Recording connection timing
+          info</a> for more info.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>requestStart</dfn> getter steps are to <a>convert fetch