Don't do Negotiate with GSSAPI if default credentials are not allowed.

net/http/http_auth_unittest.cc

Index: net/http/http_auth_unittest.cc
diff --git a/net/http/http_auth_unittest.cc b/net/http/http_auth_unittest.cc
index d9c06fa9f3e418b46fa422606a179496483e6bc2..b66e0bef97007d078f54702fd16be157275c74b7 100644
--- a/net/http/http_auth_unittest.cc
+++ b/net/http/http_auth_unittest.cc
@@ -70,8 +70,11 @@ TEST(HttpAuthTest, ChooseBestChallenge) {
     }
   };
   GURL origin("http://www.example.com");
-  scoped_ptr<HttpAuthHandlerFactory> http_auth_handler_factory(
+  URLSecurityManagerAllow url_security_manager;
+  scoped_ptr<HttpAuthHandlerRegistryFactory> http_auth_handler_factory(
       HttpAuthHandlerFactory::CreateDefault());
+  http_auth_handler_factory->SetURLSecurityManager(
+      "negotiate", &url_security_manager);
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
     // Make a HttpResponseHeaders object.
@@ -186,8 +189,11 @@ TEST(HttpAuthTest, ChooseBestChallengeConnectionBasedNegotiate) {
     }
   };
   GURL origin("http://www.example.com");
-  scoped_ptr<HttpAuthHandlerFactory> http_auth_handler_factory(
+  URLSecurityManagerAllow url_security_manager;
+  scoped_ptr<HttpAuthHandlerRegistryFactory> http_auth_handler_factory(
       HttpAuthHandlerFactory::CreateDefault());
+  http_auth_handler_factory->SetURLSecurityManager(
+      "negotiate", &url_security_manager);
 
   scoped_ptr<HttpAuthHandler> handler;
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {