Remove stl_util's STLDeleteContainerPairSecondPointers.

chrome/browser/password_manager/password_store_mac_unittest.cc

Index: chrome/browser/password_manager/password_store_mac_unittest.cc
diff --git a/chrome/browser/password_manager/password_store_mac_unittest.cc b/chrome/browser/password_manager/password_store_mac_unittest.cc
index 412630709bb2d0a88c975c7f79b7bffeb2cb3840..9895e4fea6b9b47a01c93712581b6d72f2b97703 100644
--- a/chrome/browser/password_manager/password_store_mac_unittest.cc
+++ b/chrome/browser/password_manager/password_store_mac_unittest.cc
@@ -514,8 +514,6 @@ TEST_F(PasswordStoreMacInternalsTest, TestKeychainSearch) {
         internal_keychain_helpers::ExtractPasswordsMergeableWithForm(
             *keychain_, item_form_pairs, *query_form);
     EXPECT_EQ(test_data[i].expected_merge_matches, matching_items.size());
-    base::STLDeleteContainerPairSecondPointers(item_form_pairs.begin(),
-                                               item_form_pairs.end());
     for (std::vector<SecKeychainItemRef>::iterator i = keychain_items.begin();
          i != keychain_items.end(); ++i) {
       keychain_->Free(*i);