Don't use IDENT_SRC_URL for HttpAuth challenges. IE hasn't supported it for years, and at worst ...

net/url_request/url_request_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <shlobj.h>
 #include <windows.h>
 #endif
@@ skipping 2447 matching lines @@
     r.Start();
 
     MessageLoop::current()->Run();
 
     EXPECT_TRUE(d.data_received().find("user/secret") != std::string::npos);
 
     // Make sure we sent the cookie in the restarted transaction.
     EXPECT_TRUE(d.data_received().find("Cookie: got_challenged=true")
         != std::string::npos);
   }
-
-  // Same test as above, except this time the restart is initiated earlier
-  // (without user intervention since identity is embedded in the URL).
-  {
-    TestNetworkDelegate network_delegate;  // must outlive URLRequest
-    scoped_refptr<TestURLRequestContext> context(
-        new TestURLRequestContext(true));
-    context->set_network_delegate(&network_delegate);
-    context->Init();
-
-    TestDelegate d;
-
-    GURL::Replacements replacements;
-    std::string username("user2");
-    std::string password("secret");
-    replacements.SetUsernameStr(username);
-    replacements.SetPasswordStr(password);
-    GURL url_with_identity = url_requiring_auth.ReplaceComponents(replacements);
-
-    URLRequest r(url_with_identity, &d);
-    r.set_context(context);
-    r.Start();
-
-    MessageLoop::current()->Run();
-
-    EXPECT_TRUE(d.data_received().find("user2/secret") != std::string::npos);
-
-    // Make sure we sent the cookie in the restarted transaction.
-    EXPECT_TRUE(d.data_received().find("Cookie: got_challenged=true")
-        != std::string::npos);
-  }
 }
 
 TEST_F(URLRequestTest, DelayedCookieCallback) {
   TestServer test_server(TestServer::TYPE_HTTP, FilePath());
   ASSERT_TRUE(test_server.Start());
 
   scoped_refptr<URLRequestContext> context(new TestURLRequestContext());
   scoped_refptr<DelayedCookieMonster> delayed_cm =
       new DelayedCookieMonster();
   scoped_refptr<CookieStore> cookie_store = delayed_cm;
@@ skipping 1570 matching lines @@
   req.SetExtraRequestHeaders(headers);
   req.Start();
   MessageLoop::current()->Run();
   // If the net tests are being run with ChromeFrame then we need to allow for
   // the 'chromeframe' suffix which is added to the user agent before the
   // closing parentheses.
   EXPECT_TRUE(StartsWithASCII(d.data_received(), "Lynx (textmode", true));
 }
 
 }  // namespace net