Disable all the tests that are flaking more than 5% on ChromeOS builders.

chrome/browser/chromeos/policy/device_local_account_browsertest.cc

 // Copyright (c) 2013 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 <map>
 #include <string>
 
 #include "apps/app_window_registry.h"
 #include "apps/ui/native_app_window.h"
 #include "ash/shell.h"
@@ skipping 650 matching lines @@
   ASSERT_TRUE(browser);
   BrowserWindow* browser_window = browser->window();
   ASSERT_TRUE(browser_window);
 
   // Verify that an attempt to enter fullscreen mode is denied.
   EXPECT_FALSE(browser_window->IsFullscreen());
   chrome::ToggleFullscreenMode(browser);
   EXPECT_FALSE(browser_window->IsFullscreen());
 }
 
-IN_PROC_BROWSER_TEST_F(DeviceLocalAccountTest, ExtensionsUncached) {
+// http://crbug.com/393208
+IN_PROC_BROWSER_TEST_F(DeviceLocalAccountTest, DISABLED_ExtensionsUncached) {
   // Make it possible to force-install a hosted app and an extension.
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
   TestingUpdateManifestProvider testing_update_manifest_provider(
       kRelativeUpdateURL);
   testing_update_manifest_provider.AddUpdate(
       kHostedAppID,
       kHostedAppVersion,
       embedded_test_server()->GetURL(std::string("/") + kHostedAppCRXPath));
   testing_update_manifest_provider.AddUpdate(
       kGoodExtensionID,
@@ skipping 702 matching lines @@
   if (!IsSessionStarted()) {
     content::WindowedNotificationObserver(chrome::NOTIFICATION_SESSION_STARTED,
                                           base::Bind(IsSessionStarted)).Wait();
   }
 }
 
 INSTANTIATE_TEST_CASE_P(TermsOfServiceTestInstance,
                         TermsOfServiceTest, testing::Bool());
 
 }  // namespace policy