Remove stl_util's STLValueDeleter.

base/stl_util.h

Index: base/stl_util.h
diff --git a/base/stl_util.h b/base/stl_util.h
index bb775f3e8563c98fd326417029df7934caccca99..c7f51a79915dea3e1c625787f7a251b82329362d 100644
--- a/base/stl_util.h
+++ b/base/stl_util.h
@@ -155,18 +155,6 @@ class STLElementDeleter {
   T* container_;
 };
 
-// Given a pointer to an STL container this class will delete all the value
-// pointers when it goes out of scope.
-template<class T>
-class STLValueDeleter {
- public:
-  STLValueDeleter<T>(T* container) : container_(container) {}
-  ~STLValueDeleter<T>() { STLDeleteValues(container_); }
-
- private:
-  T* container_;
-};
-
 // Test to see if a set, map, hash_set or hash_map contains a particular key.
 // Returns true if the key is in the collection.
 template <typename Collection, typename Key>