Revert "Fix a ton of compiler warnings."

base/file_descriptor_shuffle.h

Index: base/file_descriptor_shuffle.h
diff --git a/base/file_descriptor_shuffle.h b/base/file_descriptor_shuffle.h
index 108a87434d52a6fac9d2cef85add557c4cff4d73..8ee774097e8f062967f0b0f7f3bdef806d3c7a4d 100644
--- a/base/file_descriptor_shuffle.h
+++ b/base/file_descriptor_shuffle.h
@@ -37,9 +37,6 @@ class InjectionDelegate {
   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