imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Core/Infrastructure/NoOpPerformanceCounter.cs

@@ -0,0 +1,53 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System.Diagnostics;
+
+namespace Microsoft.AspNet.SignalR.Infrastructure
+{
+    internal class NoOpPerformanceCounter : IPerformanceCounter
+    {
+        public string CounterName
+        {
+            get
+            {
+                return GetType().Name;
+            }
+        }
+
+        public long Decrement()
+        {
+            return 0;
+        }
+
+        public long Increment()
+        {
+            return 0;
+        }
+
+        public long IncrementBy(long value)
+        {
+            return 0;
+        }
+
+        public long RawValue
+        {
+            get { return 0; }
+            set { }
+        }
+
+        public void Close()
+        {
+
+        }
+
+        public void RemoveInstance()
+        {
+            
+        }
+
+        public CounterSample NextSample()
+        {
+            return CounterSample.Empty;
+        }
+    }
+}