Re-committing http://codereview.chromium.org/8736001/ originally committed revision=112305

third_party/libphonenumber/cpp/src/stl_util.h

-// Copyright (C) 2011 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef I18N_PHONENUMBERS_STL_UTIL_H_
-#define I18N_PHONENUMBERS_STL_UTIL_H_
-
-namespace i18n {
-namespace phonenumbers {
-
-// Compares the first attribute of two pairs.
-struct OrderByFirst {
-  template <typename T>
-  bool operator()(const T& p1, const T& p2) const {
-    return p1.first < p2.first;
-  }
-};
-
-// Deletes the second attribute (pointer type expected) of the pairs contained
-// in the provided range.
-template <typename ForwardIterator>
-void STLDeleteContainerPairSecondPointers(const ForwardIterator& begin,
-                                          const ForwardIterator& end) {
-  for (ForwardIterator it = begin; it != end; ++it) {
-    delete it->second;
-  }
-}
-
-}  // namespace phonenumbers
-}  // namespace i18n
-
-#endif  // I18N_PHONENUMBERS_STL_UTIL_H_