Add OVERRIDE to base/.

base/file_descriptor_shuffle.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 BASE_FILE_DESCRIPTOR_SHUFFLE_H_
 #define BASE_FILE_DESCRIPTOR_SHUFFLE_H_
 #pragma once
 
 // This code exists to perform the shuffling of file descriptors which is
 // commonly needed when forking subprocesses. The naive approve is very simple,
 // just call dup2 to setup the desired descriptors, but wrong. It's tough to
 // handle the edge cases (like mapping 0 -> 1, 1 -> 0) correctly.
 //
 // In order to unittest this code, it's broken into the abstract action (an
 // injective multimap) and the concrete code for dealing with file descriptors.
 // Users should use the code like this:
 //   base::InjectiveMultimap file_descriptor_map;
 //   file_descriptor_map.push_back(base::InjectionArc(devnull, 0, true));
 //   file_descriptor_map.push_back(base::InjectionArc(devnull, 2, true));
 //   file_descriptor_map.push_back(base::InjectionArc(pipe[1], 1, true));
 //   base::ShuffleFileDescriptors(file_descriptor_map);
 //
 // and trust the the Right Thing will get done.
 
 #include <vector>
 
 #include "base/base_export.h"
+#include "base/compiler_specific.h"
 
 namespace base {
 
 // A Delegate which performs the actions required to perform an injective
 // multimapping in place.
 class InjectionDelegate {
  public:
   // Duplicate |fd|, an element of the domain, and write a fresh element of the
   // domain into |result|. Returns true iff successful.
   virtual bool Duplicate(int* result, int fd) = 0;
   // Destructively move |src| to |dest|, overwriting |dest|. Returns true iff
   // successful.
   virtual bool Move(int src, int dest) = 0;
   // Delete an element of the domain.
   virtual void Close(int fd) = 0;
 
  protected:
   virtual ~InjectionDelegate() {}
 };
 
 // An implementation of the InjectionDelegate interface using the file
 // descriptor table of the current process as the domain.
 class FileDescriptorTableInjection : public InjectionDelegate {
-  virtual bool Duplicate(int* result, int fd);
-  virtual bool Move(int src, int dest);
-  virtual void Close(int fd);
+  virtual bool Duplicate(int* result, int fd) OVERRIDE;
+  virtual bool Move(int src, int dest) OVERRIDE;
+  virtual void Close(int fd) OVERRIDE;
 };
 
 // A single arc of the directed graph which describes an injective multimapping.
 struct InjectionArc {
   InjectionArc(int in_source, int in_dest, bool in_close)
       : source(in_source),
         dest(in_dest),
         close(in_close) {
   }
 
@@ skipping 14 matching lines @@
 
 // This function will not call malloc but will mutate |map|
 static inline bool ShuffleFileDescriptors(InjectiveMultimap* map) {
   FileDescriptorTableInjection delegate;
   return PerformInjectiveMultimapDestructive(map, &delegate);
 }
 
 }  // namespace base
 
 #endif  // BASE_FILE_DESCRIPTOR_SHUFFLE_H_