Disable PasswordSecurityLevelDowngradedFromHttpsIframe on Linux.

chrome/browser/ssl/chrome_security_state_model_client_browser_tests.cc

 // Copyright 2015 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 "chrome/browser/ssl/chrome_security_state_model_client.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/strings/string_split.h"
@@ skipping 1006 matching lines @@
   content::NavigationEntry* entry = contents->GetController().GetVisibleEntry();
   ASSERT_TRUE(entry);
   EXPECT_TRUE(entry->GetSSL().content_status &
               content::SSLStatus::DISPLAYED_PASSWORD_FIELD_ON_HTTP);
 }
 
 // Tests that when a visible password field is detected inside an iframe
 // on an HTTP page load, and when the command-line flag is set, the
 // security level is downgraded to HTTP_SHOW_WARNING, even if the iframe
 // itself was loaded over HTTPS.
+#if defined(OS_LINUX)
+// Flaky on Linux. See https://crbug.com/662485.
+#define MAYBE_PasswordSecurityLevelDowngradedFromHttpsIframe \
+  DISABLED_PasswordSecurityLevelDowngradedFromHttpsIframe
+#else
+#define MAYBE_PasswordSecurityLevelDowngradedFromHttpsIframe \
+  PasswordSecurityLevelDowngradedFromHttpsIframe
+#endif
 IN_PROC_BROWSER_TEST_F(ChromeSecurityStateModelClientTestWithPasswordCcSwitch,
-                       PasswordSecurityLevelDowngradedFromHttpsIframe) {
+                       MAYBE_PasswordSecurityLevelDowngradedFromHttpsIframe) {
   content::WebContents* contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   ASSERT_TRUE(contents);
 
   ChromeSecurityStateModelClient* model_client =
       ChromeSecurityStateModelClient::FromWebContents(contents);
   ASSERT_TRUE(model_client);
 
   // Navigate to an HTTP URL, which loads an iframe using the host and port of
   // |https_server_|.
@@ skipping 1002 matching lines @@
   ChromeSecurityStateModelClient* model_client =
       ChromeSecurityStateModelClient::FromWebContents(web_contents);
   ASSERT_TRUE(model_client);
   SecurityStateModel::SecurityInfo security_info;
   model_client->GetSecurityInfo(&security_info);
   EXPECT_EQ(SecurityStateModel::SECURE, security_info.security_level);
   EXPECT_EQ(kTestSCTStatuses, security_info.sct_verify_statuses);
 }
 
 }  // namespace