Cleanup PreferenceMACs on browser_tests startup

base/win/registry_unittest.cc

 // Copyright (c) 2011 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 "base/win/registry.h"
 
 #include <stdint.h>
 
 #include <cstring>
 #include <vector>
@@ skipping 316 matching lines @@
                      KEY_SET_VALUE | kRedirectedViewMask));
   ASSERT_NE(ERROR_SUCCESS, key.DeleteKey(kRootKey));
 
   ASSERT_EQ(ERROR_SUCCESS,
             key.Open(HKEY_LOCAL_MACHINE,
                      L"Software",
                      KEY_SET_VALUE | kNativeViewMask));
   ASSERT_EQ(ERROR_SUCCESS, key.DeleteKey(kRootKey));
 }
 
-// Test is flaky. crbug.com/721245
-TEST_F(RegistryTest, DISABLED_OpenSubKey) {
+TEST_F(RegistryTest, OpenSubKey) {
   RegKey key;
   ASSERT_EQ(ERROR_SUCCESS,
             key.Open(HKEY_CURRENT_USER,
                      kRootKey,
                      KEY_READ | KEY_CREATE_SUB_KEY));
 
   ASSERT_NE(ERROR_SUCCESS, key.OpenKey(L"foo", KEY_READ));
   ASSERT_EQ(ERROR_SUCCESS, key.CreateKey(L"foo", KEY_READ));
   ASSERT_EQ(ERROR_SUCCESS, key.Open(HKEY_CURRENT_USER, kRootKey, KEY_READ));
   ASSERT_EQ(ERROR_SUCCESS, key.OpenKey(L"foo", KEY_READ));
@@ skipping 66 matching lines @@
   ASSERT_TRUE(key.StartWatching(Bind(&TestChangeDelegate::OnKeyChanged,
                                      Unretained(&delegate))));
   base::RunLoop().RunUntilIdle();
   EXPECT_FALSE(delegate.WasCalled());
 }
 
 }  // namespace
 
 }  // namespace win
 }  // namespace base