Revert cross-origin auth prompt blocking.

chrome/browser/ui/login/login_prompt_browsertest.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 <algorithm>
 #include <list>
 #include <map>
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/prerender/prerender_manager.h"
@@ skipping 736 matching lines @@
     load_stop_waiter.Wait();
   }
 
   EXPECT_EQ(0, observer.auth_supplied_count_);
   EXPECT_EQ(1, observer.auth_needed_count_);
   EXPECT_EQ(1, observer.auth_cancelled_count_);
   EXPECT_TRUE(test_server()->Stop());
 }
 
 // Block crossdomain subresource login prompting as a phishing defense.
-IN_PROC_BROWSER_TEST_F(LoginPromptBrowserTest, BlockCrossdomainPrompt) {
+// Disabled per http://crbug.com/174179.
+IN_PROC_BROWSER_TEST_F(LoginPromptBrowserTest,
+                       DISABLED_BlockCrossdomainPrompt) {
   const char* kTestPage = "files/login/load_img_from_b.html";
 
   host_resolver()->AddRule("www.a.com", "127.0.0.1");
   host_resolver()->AddRule("www.b.com", "127.0.0.1");
   ASSERT_TRUE(test_server()->Start());
 
   content::WebContents* contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   NavigationController* controller = &contents->GetController();
   LoginPromptBrowserTestObserver observer;
@@ skipping 250 matching lines @@
   EXPECT_EQ(1, observer.auth_needed_count_);
   EXPECT_EQ(1, observer.auth_supplied_count_);
   EXPECT_EQ(0, observer.auth_cancelled_count_);
   EXPECT_EQ(1, observer_incognito.auth_needed_count_);
   EXPECT_EQ(0, observer_incognito.auth_supplied_count_);
   EXPECT_EQ(0, observer_incognito.auth_cancelled_count_);
   EXPECT_TRUE(test_server()->Stop());
 }
 
 }  // namespace