Revert "Fix a ton of compiler warnings."

base/file_descriptor_shuffle.h

 // Copyright (c) 2009 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_
 
 // 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
@@ skipping 19 matching lines @@
 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:
-  ~InjectionDelegate() {}
 };
 
 // An implementation of the InjectionDelegate interface using the file
 // descriptor table of the current process as the domain.
 class FileDescriptorTableInjection : public InjectionDelegate {
   bool Duplicate(int* result, int fd);
   bool Move(int src, int dest);
   void Close(int fd);
 };
 
@@ skipping 17 matching lines @@
                               InjectionDelegate* delegate);
 
 static inline bool ShuffleFileDescriptors(const InjectiveMultimap& map) {
   FileDescriptorTableInjection delegate;
   return PerformInjectiveMultimap(map, &delegate);
 }
 
 }  // namespace base
 
 #endif  // !BASE_FILE_DESCRIPTOR_SHUFFLE_H_