Disable flaky test PrerenderBrowserTest.AutosigninInPrerenderer

chrome/browser/prerender/prerender_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 <stddef.h>
 #include <deque>
 #include <set>
 #include <string>
 #include <unordered_map>
 #include <utility>
@@ skipping 3199 matching lines @@
   EXPECT_TRUE(ExecuteScriptAndExtractString(
       web_contents,
       "window.domAutomationController.send("
       "document.getElementsByTagName('pre')[0].innerText);",
       &body));
   EXPECT_EQ("text=value\n", body);
 }
 
 // Prerenders a page that tries to automatically sign user in via the Credential
 // Manager API. The page should be killed.
-IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, AutosigninInPrerenderer) {
+//
+// Disabled. See http://crbug.com/660278
+IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_AutosigninInPrerenderer) {
   // Set up a credential in the password store.
   PasswordStoreFactory::GetInstance()->SetTestingFactory(
       current_browser()->profile(),
       password_manager::BuildPasswordStore<
           content::BrowserContext, password_manager::TestPasswordStore>);
   scoped_refptr<password_manager::TestPasswordStore> password_store =
       static_cast<password_manager::TestPasswordStore*>(
           PasswordStoreFactory::GetForProfile(
               current_browser()->profile(),
               ServiceAccessType::IMPLICIT_ACCESS).get());
@@ skipping 171 matching lines @@
       browser()->tab_strip_model()->GetActiveWebContents();
   bool display_test_result = false;
   ASSERT_TRUE(content::ExecuteScriptAndExtractBool(web_contents,
                                                    "DidDisplayReallyPass()",
                                                    &display_test_result));
   ASSERT_TRUE(display_test_result);
 }
 #endif  // !defined(DISABLE_NACL)
 
 }  // namespace prerender