Revert of Disable two (unrelated) flaky tests on win

chrome/browser/extensions/api/messaging/native_message_process_host_unittest.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/api/messaging/native_message_process_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 285 matching lines @@
   run_loop_.reset(new base::RunLoop());
   run_loop_->Run();
   EXPECT_TRUE(last_message_parsed_->GetInteger("id", &id));
   EXPECT_EQ(2, id);
   EXPECT_TRUE(last_message_parsed_->GetString("echo.foo", &text));
   EXPECT_EQ("bar", text);
   EXPECT_TRUE(last_message_parsed_->GetString("caller_url", &url));
   EXPECT_EQ(expected_url, url);
 }
 
-// http://crbug.com/723291
-#if defined(OS_WIN)
-#define MAYBE_UserLevel DISABLED_UserLevel
-#else
-#define MAYBE_UserLevel UserLevel
-#endif
-TEST_F(NativeMessagingTest, MAYBE_UserLevel) {
+TEST_F(NativeMessagingTest, UserLevel) {
   ScopedTestNativeMessagingHost test_host;
   ASSERT_NO_FATAL_FAILURE(test_host.RegisterTestHost(true));
 
   std::string error_message;
   native_message_host_ = NativeMessageProcessHost::Create(
       NULL,
       ScopedTestNativeMessagingHost::kExtensionId,
       ScopedTestNativeMessagingHost::kHostName,
       true,
       &error_message);
@@ skipping 21 matching lines @@
   native_message_host_->Start(this);
   ASSERT_TRUE(native_message_host_.get());
   run_loop_.reset(new base::RunLoop());
   run_loop_->Run();
 
   // The host should fail to start.
   ASSERT_TRUE(channel_closed_);
 }
 
 }  // namespace extensions