Remove the Value class names from the global namespace.

chrome/browser/prefs/pref_hash_store_impl.cc

 // Copyright 2013 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 "chrome/browser/prefs/pref_hash_store_impl.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 39 matching lines @@
   }
   NOTREACHED() << "Unexpected PrefHashCalculator::ValidationResult: "
                << validation_result;
   return PrefHashStore::UNKNOWN_VALUE;
 }
 
 void PrefHashStoreImpl::StoreHash(
     const std::string& path, const base::Value* new_value) {
   {
     DictionaryPrefUpdate update(local_state_, prefs::kProfilePreferenceHashes);
-    DictionaryValue* child_dictionary = NULL;
+    base::DictionaryValue* child_dictionary = NULL;
 
     // Get the dictionary corresponding to the profile name, which may have a
     // '.'
     if (!update->GetDictionaryWithoutPathExpansion(hash_store_id_,
                                                    &child_dictionary)) {
-      child_dictionary = new DictionaryValue;
+      child_dictionary = new base::DictionaryValue;
       update->SetWithoutPathExpansion(hash_store_id_, child_dictionary);
     }
 
     child_dictionary->SetString(
         path, pref_hash_calculator_.Calculate(path, new_value));
   }
   // TODO(erikwright): During tests, pending writes were still waiting when the
   // IO thread is already gone. Consider other solutions.
   local_state_->CommitPendingWrite();
 }