Disable some flaky tests

chrome/browser/apps/app_browsertest.cc

 // Copyright 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 "apps/launcher.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
@@ skipping 1023 matching lines @@
   ASSERT_TRUE(should_install.seen());
 
   ExtensionTestMessageListener launched_listener("Launched", false);
   OpenApplication(AppLaunchParams(browser()->profile(), extension,
                                   LAUNCH_CONTAINER_NONE, NEW_WINDOW,
                                   extensions::SOURCE_TEST));
 
   ASSERT_TRUE(launched_listener.WaitUntilSatisfied());
 }
 
+// Disabled due to flakiness. http://crbug.com/468609
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest,
-                       ComponentExtensionRuntimeReload) {
+                       DISABLED_ComponentExtensionRuntimeReload) {
   // Ensure that we wait until the background page is run (to register the
   // OnLaunched listener) before trying to open the application. This is similar
   // to LoadAndLaunchPlatformApp, but we want to load as a component extension.
   content::WindowedNotificationObserver app_loaded_observer(
       content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
       content::NotificationService::AllSources());
 
   const Extension* extension = LoadExtensionAsComponent(
       test_data_dir_.AppendASCII("platform_apps").AppendASCII("component"));
   ASSERT_TRUE(extension);
@@ skipping 277 matching lines @@
   // Now check that the app window's default zoom, and actual zoom level,
   // have not been changed from the default.
   WebContents* web_contents = GetFirstAppWindowWebContents();
   content::HostZoomMap* app_host_zoom_map = content::HostZoomMap::Get(
       web_contents->GetSiteInstance());
   EXPECT_EQ(0, app_host_zoom_map->GetDefaultZoomLevel());
   EXPECT_EQ(0, app_host_zoom_map->GetZoomLevel(web_contents));
 }
 
 }  // namespace extensions