Remove the Value class names from the global namespace.

chrome/browser/prefs/pref_hash_store_impl.cc

Index: chrome/browser/prefs/pref_hash_store_impl.cc
diff --git a/chrome/browser/prefs/pref_hash_store_impl.cc b/chrome/browser/prefs/pref_hash_store_impl.cc
index 0d08c556c72ec4c822ca0d06dd950ffd68970ead..ef698fc75fcef3ca1726764ae3cfe8e2f25fbe3e 100644
--- a/chrome/browser/prefs/pref_hash_store_impl.cc
+++ b/chrome/browser/prefs/pref_hash_store_impl.cc
@@ -57,13 +57,13 @@ 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);
     }