React to HttpAbstractions changes

src/Microsoft.AspNet.Server.Kestrel/Http/Frame.FeatureCollection.cs

@@ -280,6 +280,16 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
             set { FastFeatureSet(key, value); }
         }
 
+        TFeature IFeatureCollection.Get<TFeature>()
+        {
+            return (TFeature)FastFeatureGet(typeof(TFeature));
+        }
+
+        void IFeatureCollection.Set<TFeature>(TFeature instance)
+        {
+            FastFeatureSet(typeof(TFeature), instance);
+        }
+
         void IHttpResponseFeature.OnStarting(Func<object, Task> callback, object state)
         {
             OnStarting(callback, state);

test/Microsoft.AspNet.Server.KestrelTests/FrameFacts.cs

@@ -26,7 +26,7 @@ namespace Microsoft.AspNet.Server.KestrelTests
             frame.Reset();
 
             // Assert
-            Assert.Equal("http", frame.Get<IHttpRequestFeature>().Scheme);
+            Assert.Equal("http", ((IFeatureCollection)frame).Get<IHttpRequestFeature>().Scheme);
         }
     }
 }