Use windows VS error reporter instead of the no-op default

src/Microsoft.VisualStudio.LanguageServices.Razor/VisualStudioErrorReporterFactory.cs

@@ -0,0 +1,35 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Composition;
+using Microsoft.CodeAnalysis.Host;
+using Microsoft.CodeAnalysis.Host.Mef;
+using Microsoft.CodeAnalysis.Razor;
+using Microsoft.VisualStudio.Shell;
+
+namespace Microsoft.VisualStudio.LanguageServices.Razor
+{
+    [Shared]
+    [ExportWorkspaceServiceFactory(typeof(ErrorReporter), ServiceLayer.Host)]
+    internal class VisualStudioErrorReporterFactory : IWorkspaceServiceFactory
+    {
+        private readonly IServiceProvider _serviceProvider;
+
+        [ImportingConstructor]
+        public VisualStudioErrorReporterFactory(SVsServiceProvider serviceProvider)
+        {
+            if (serviceProvider == null)
+            {
+                throw new ArgumentNullException(nameof(serviceProvider));
+            }
+
+            _serviceProvider = serviceProvider;
+        }
+
+        public IWorkspaceService CreateService(HostWorkspaceServices workspaceServices)
+        {
+            return new VisualStudioErrorReporter(_serviceProvider);
+        }
+    }
+}