[net/http auth] Use strings to identify authentication schemes.

net/spdy/spdy_proxy_client_socket_unittest.cc

Index: net/spdy/spdy_proxy_client_socket_unittest.cc
diff --git a/net/spdy/spdy_proxy_client_socket_unittest.cc b/net/spdy/spdy_proxy_client_socket_unittest.cc
index b8f62cfb094e42b41776894db2a1a4c5a91a0d97..e7c83d1b781e57b0ddb6abab4b8459fac4df05fc 100644
--- a/net/spdy/spdy_proxy_client_socket_unittest.cc
+++ b/net/spdy/spdy_proxy_client_socket_unittest.cc
@@ -98,12 +98,9 @@ class SpdyProxyClientSocketTest
   void AddAuthToCache() {
     const base::string16 kFoo(base::ASCIIToUTF16("foo"));
     const base::string16 kBar(base::ASCIIToUTF16("bar"));
-    session_->http_auth_cache()->Add(GURL(kProxyUrl),
-                                     "MyRealm1",
-                                     HttpAuth::AUTH_SCHEME_BASIC,
+    session_->http_auth_cache()->Add(GURL(kProxyUrl), "MyRealm1", "basic",
                                      "Basic realm=MyRealm1",
-                                     AuthCredentials(kFoo, kBar),
-                                     "/");
+                                     AuthCredentials(kFoo, kBar), "/");
   }
 
   void Run(int steps) {