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

Index: net/url_request/url_request_unittest.cc
===================================================================
--- net/url_request/url_request_unittest.cc	(revision 120580)
+++ net/url_request/url_request_unittest.cc	(working copy)
@@ -2465,37 +2465,6 @@
     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) {