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

chrome/browser/extensions/extension_incognito_apitest.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/extensions/browser_action_test_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 102 matching lines @@
       embedded_test_server()->GetURL("/extensions/test_file.html"));
 
   ASSERT_TRUE(LoadExtensionIncognito(test_data_dir_
       .AppendASCII("incognito").AppendASCII("apis")));
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
 // Tests that the APIs in an incognito-enabled split-mode extension work
 // properly.
-#if defined(OS_WIN)
 // http://crbug.com/120484
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_IncognitoSplitMode) {
-#else
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, IncognitoSplitMode) {
-#endif
   host_resolver()->AddRule("*", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   // We need 2 ResultCatchers because we'll be running the same test in both
   // regular and incognito mode.
   ResultCatcher catcher;
   catcher.RestrictToProfile(browser()->profile());
   ResultCatcher catcher_incognito;
   catcher_incognito.RestrictToProfile(
       browser()->profile()->GetOffTheRecordProfile());
@@ skipping 68 matching lines @@
   // Open incognito window and navigate to test page.
   Browser* incognito_browser = ui_test_utils::OpenURLOffTheRecord(
       browser()->profile(),
       embedded_test_server()->GetURL("/extensions/test_file.html"));
 
   // Simulate the incognito's browser action being clicked.
   BrowserActionTestUtil(incognito_browser).Press(0);
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }