Remove #pragma once from content

content/common/debug_flags.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_DEBUG_FLAGS_H_
 #define CONTENT_COMMON_DEBUG_FLAGS_H_
-#pragma once
 
 #include "content/common/content_export.h"
 #include "content/public/common/process_type.h"
 
 class CommandLine;
 
 class CONTENT_EXPORT DebugFlags {
  public:
 
   // Updates the command line arguments with debug-related flags. If
   // debug flags have been used with this process, they will be
   // filtered and added to command_line as needed. is_in_sandbox must
   // be true if the child process will be in a sandbox.
   //
   // Returns true if the caller should "help" the child process by
   // calling the JIT debugger on it. It may only happen if
   // is_in_sandbox is true.
   static bool ProcessDebugFlags(CommandLine* command_line,
                                 content::ProcessType type,
                                 bool is_in_sandbox);
 };
 
 #endif  // CONTENT_COMMON_DEBUG_FLAGS_H_