Use exactly one of final, override, and virtual

util/test/multiprocess_exec.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 36 matching lines @@
   //!     process in its `argv[]` vector. This vector must begin at `argv[1]`,
   //!     as \a command is implicitly used as `argv[0]`. This argument may be
   //!     `NULL` if no command-line arguments are to be passed.
   void SetChildCommand(const std::string& command,
                        const std::vector<std::string>* arguments);
 
  protected:
   ~MultiprocessExec();
 
   // Multiprocess:
-  virtual void PreFork() override;
+  void PreFork() override;
 
  private:
   // Multiprocess:
-  virtual void MultiprocessChild() override;
+  void MultiprocessChild() override;
 
   std::string command_;
   std::vector<std::string> arguments_;
   std::vector<const char*> argv_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiprocessExec);
 };
 
 }  // namespace test
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_TEST_MULTIPROCESS_EXEC_H_