Enable IsolatedAppTest.CookieIsolation on windows.

chrome/browser/extensions/isolated_app_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 <stddef.h>
 #include <utility>
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
@@ skipping 181 matching lines @@
   chrome::GoBack(browser(), CURRENT_TAB);
   EXPECT_FALSE(chrome::CanGoBack(browser()));
 }
 
 // Tests that cookies set within an isolated app are not visible to normal
 // pages or other apps.
 //
 // TODO(ajwong): Also test what happens if an app spans multiple sites in its
 // extent.  These origins should also be isolated, but still have origin-based
 // separation as you would expect.
-//
-// This test is disabled due to being flaky. http://crbug.com/86562
-#if defined(OS_WIN)
-#define MAYBE_CookieIsolation DISABLED_CookieIsolation
-#else
-#define MAYBE_CookieIsolation CookieIsolation
-#endif
-IN_PROC_BROWSER_TEST_F(IsolatedAppTest, MAYBE_CookieIsolation) {
+IN_PROC_BROWSER_TEST_F(IsolatedAppTest, CookieIsolation) {
   host_resolver()->AddRule("*", "127.0.0.1");
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ASSERT_TRUE(LoadExtension(test_data_dir_.AppendASCII("isolated_apps/app1")));
   ASSERT_TRUE(LoadExtension(test_data_dir_.AppendASCII("isolated_apps/app2")));
 
   // The app under test acts on URLs whose host is "localhost",
   // so the URLs we navigate to must have host "localhost".
   GURL base_url = embedded_test_server()->GetURL("/extensions/isolated_apps/");
   GURL::Replacements replace_host;
@@ skipping 343 matching lines @@
       browser(), base_url.Resolve("non_app/main.html"));
   ASSERT_TRUE(ExecuteScriptAndExtractString(
       browser()->tab_strip_model()->GetWebContentsAt(0),
       kRetrieveSessionStorage.c_str(), &result));
   EXPECT_EQ("ss_normal", result);
 }
 
 }  // namespace
 
 }  // namespace extensions