Disable all the browser_tests that are flaking more than 5% of the time on trybots.

chrome/browser/ui/browser_navigator_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 "chrome/browser/ui/browser_navigator_browsertest.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 1028 matching lines @@
 // Bookmark manager is expected to always open in normal mode regardless
 // of whether the user is trying to open it in incognito mode or not.
 // This test verifies that if incognito mode is forced (by policy), bookmark
 // manager doesn't open at all.
 IN_PROC_BROWSER_TEST_F(BrowserNavigatorTest,
                        Disposition_Bookmarks_DoNothingIfIncognitoIsForced) {
   RunDoNothingIfIncognitoIsForcedTest(GURL(chrome::kChromeUIBookmarksURL));
 }
 
 // This test makes sure a crashed singleton tab reloads from a new navigation.
+// http://crbug.com/396371
 IN_PROC_BROWSER_TEST_F(BrowserNavigatorTest,
-                       NavigateToCrashedSingletonTab) {
+                       DISABLED_NavigateToCrashedSingletonTab) {
   GURL singleton_url(GetContentSettingsURL());
   WebContents* web_contents = chrome::AddSelectedTabWithURL(
       browser(), singleton_url, content::PAGE_TRANSITION_LINK);
 
   // We should have one browser with 2 tabs, the 2nd selected.
   EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
   EXPECT_EQ(2, browser()->tab_strip_model()->count());
   EXPECT_EQ(1, browser()->tab_strip_model()->active_index());
 
   // Kill the singleton tab.
@@ skipping 308 matching lines @@
   // Open a renderer initiated POST request in new foreground tab.
   base::string16 expected_title(base::ASCIIToUTF16(kExpectedTitle));
   std::string post_data = kExpectedTitle;
   base::string16 title;
   ASSERT_TRUE(OpenPOSTURLInNewForegroundTabAndGetTitle(
       test_server()->GetURL(kEchoTitleCommand), post_data, false, &title));
   EXPECT_NE(expected_title, title);
 }
 
 }  // namespace