Fix header guards in //chrome

chrome/browser/apps/app_shim/test/app_shim_host_manager_test_api_mac.h

 // 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.
 
-#ifndef CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H
-#define CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H
+#ifndef CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H_
+#define CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H_
 
 #include <memory>
 
 #include "base/macros.h"
 
 class AppShimHostManager;
 
 namespace base {
 class FilePath;
 }
@@ skipping 17 matching lines @@
       std::unique_ptr<apps::ExtensionAppShimHandler> handler);
 
  private:
   AppShimHostManager* host_manager_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(AppShimHostManagerTestApi);
 };
 
 }  // namespace test
 
-#endif  // CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H
+#endif  // CHROME_BROWSER_APPS_APP_SHIM_TEST_APP_SHIM_HOST_MANAGER_TEST_API_MAC_H_