[v3] Remove hack for 53067 in mainline

[Paolo Carlini]

Hi,

not necessary anymore thanks to the resolution of c++/51213. Tested 
x86_64-linux multilib, committed.

Thanks,
Paolo.

///////////////////////
2012-10-12  Paolo Carlini  <paolo.carl...@oracle.com>

        * include/bits/hashtable_policy.h: Revert libstdc++/53067 quick
        hacks thanks to the resolution of c++/51213.
Index: include/bits/hashtable_policy.h
===================================================================
--- include/bits/hashtable_policy.h     (revision 192378)
+++ include/bits/hashtable_policy.h     (working copy)
@@ -921,8 +921,7 @@
   /// Specialization using EBO.
   template<int _Nm, typename _Tp>
     struct _Hashtable_ebo_helper<_Nm, _Tp, true>
-    // See PR53067.
-    : public _Tp
+    : private _Tp
     {
       _Hashtable_ebo_helper() = default;
 
@@ -989,9 +988,8 @@
   template<typename _Key, typename _Value, typename _ExtractKey,
           typename _H1, typename _H2, typename _Hash>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>
-    // See PR53067.
-    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
-      public  _Hashtable_ebo_helper<1, _Hash>
+    : private _Hashtable_ebo_helper<0, _ExtractKey>,
+      private _Hashtable_ebo_helper<1, _Hash>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey>    _EboExtractKey;
@@ -1066,10 +1064,9 @@
           typename _H1, typename _H2>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2,
                           _Default_ranged_hash, false>
-    // See PR53067.
-    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
-      public  _Hashtable_ebo_helper<1, _H1>,
-      public  _Hashtable_ebo_helper<2, _H2>
+    : private _Hashtable_ebo_helper<0, _ExtractKey>,
+      private _Hashtable_ebo_helper<1, _H1>,
+      private _Hashtable_ebo_helper<2, _H2>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey>    _EboExtractKey;
@@ -1150,10 +1147,9 @@
           typename _H1, typename _H2>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2,
                           _Default_ranged_hash, true>
-    // See PR53067.
-    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
-      public  _Hashtable_ebo_helper<1, _H1>,
-      public  _Hashtable_ebo_helper<2, _H2>
+    : private _Hashtable_ebo_helper<0, _ExtractKey>,
+      private _Hashtable_ebo_helper<1, _H1>,
+      private _Hashtable_ebo_helper<2, _H2>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey>    _EboExtractKey;
@@ -1272,8 +1268,7 @@
           typename _H1, typename _H2, typename _Hash>
     struct _Local_iterator_base<_Key, _Value, _ExtractKey,
                                _H1, _H2, _Hash, true>
-    // See PR53067.
-    : public _H2
+    : private _H2
     {
       _Local_iterator_base() = default;
       _Local_iterator_base(_Hash_node<_Value, true>* __p,
@@ -1305,9 +1300,8 @@
           typename _H1, typename _H2, typename _Hash>
     struct _Local_iterator_base<_Key, _Value, _ExtractKey,
                                _H1, _H2, _Hash, false>
-    // See PR53067.
-    : public _Hash_code_base<_Key, _Value, _ExtractKey,
-                            _H1, _H2, _Hash, false>
+    : private _Hash_code_base<_Key, _Value, _ExtractKey,
+                             _H1, _H2, _Hash, false>
     {
       _Local_iterator_base() = default;
       _Local_iterator_base(_Hash_node<_Value, false>* __p,
@@ -1470,10 +1464,9 @@
           typename _ExtractKey, typename _Equal,
           typename _H1, typename _H2, typename _Hash, typename _Traits>
   struct _Hashtable_base
-  // See PR53067.
-  : public  _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash,
-                             _Traits::__hash_cached::value>,
-    public _Hashtable_ebo_helper<0, _Equal>
+  : public _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash,
+                          _Traits::__hash_cached::value>,
+    private _Hashtable_ebo_helper<0, _Equal>
   {
   public:
     typedef _Key                                    key_type;