Remove #pragma once from content

content/common/sandbox_mac_unittest_helper.h

 // 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.
 
 #ifndef CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_
 #define CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_
-#pragma once
 
 #include "base/test/multiprocess_test.h"
 #include "content/common/sandbox_mac.h"
 
 namespace sandboxtest {
 
 // Helpers for writing unit tests that runs in the context of the Mac sandbox.
 //
 // How to write a sandboxed test:
 // 1. Create a class that inherits from MacSandboxTestCase and overrides
@@ skipping 95 matching lines @@
   namespace { \
     sandboxtest::internal::RegisterSandboxTest<class_name> \
       register_test##class_name(#class_name); \
   }  // namespace
 
 }  // namespace internal
 
 }  // namespace sandboxtest
 
 #endif  // CONTENT_COMMON_SANDBOX_MAC_UNITTEST_HELPER_H_