Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/src/System.Web.WebPages/BrowserOverrideStore.cs

@@ -0,0 +1,14 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+namespace System.Web.WebPages
+{
+    /// <summary>
+    /// The current BrowserOverrideStore is used to get and set the user agent of a request.
+    /// For an example see CookieBasedBrowserOverrideStore.
+    /// </summary>
+    public abstract class BrowserOverrideStore
+    {
+        public abstract string GetOverriddenUserAgent(HttpContextBase httpContext);
+        public abstract void SetOverriddenUserAgent(HttpContextBase httpContext, string userAgent);
+    }
+}