Revert of Add PrefStore::GetValues

components/prefs/pref_value_map.cc

 // 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.
 
 #include "components/prefs/pref_value_map.h"
 
 #include <map>
 #include <memory>
 #include <utility>
 
@@ skipping 139 matching lines @@
       ++other_pref;
     }
   }
 
   // Add the remaining entries.
   for ( ; this_pref != this_prefs.end(); ++this_pref)
       differing_keys->push_back(this_pref->first);
   for ( ; other_pref != other_prefs.end(); ++other_pref)
       differing_keys->push_back(other_pref->first);
 }
-
-std::unique_ptr<base::DictionaryValue> PrefValueMap::AsDictionaryValue() const {
-  auto dictionary = base::MakeUnique<base::DictionaryValue>();
-  for (const auto& value : prefs_) {
-    dictionary->Set(value.first, value.second->CreateDeepCopy());
-  }
-  return dictionary;
-}