Re-committing http://codereview.chromium.org/6803005/ after fixing multi-dll build:

third_party/libphonenumber/cpp/src/phonenumber.cc

+// Copyright (C) 2009 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.
+
+// Author: Philippe Liard
+
+#include "phonemetadata.pb.h"
+#include "phonenumber.pb.h"
+
+namespace i18n {
+namespace phonenumbers {
+
+bool ExactlySameAs(const PhoneNumber& first_number,
+                   const PhoneNumber& second_number) {
+  if (first_number.has_country_code() != second_number.has_country_code() ||
+      first_number.country_code() != second_number.country_code()) {
+    return false;
+  }
+  if (first_number.has_national_number() !=
+      second_number.has_national_number() ||
+      first_number.national_number() != second_number.national_number()) {
+    return false;
+  }
+  if (first_number.has_extension() != second_number.has_extension() ||
+      first_number.extension() != second_number.extension()) {
+    return false;
+  }
+  if (first_number.has_italian_leading_zero() !=
+      second_number.has_italian_leading_zero() ||
+      first_number.italian_leading_zero() !=
+      second_number.italian_leading_zero()) {
+    return false;
+  }
+  if (first_number.has_raw_input() != second_number.has_raw_input() ||
+      first_number.raw_input() != second_number.raw_input()) {
+    return false;
+  }
+  if (first_number.has_country_code_source() !=
+      second_number.has_country_code_source() ||
+      first_number.country_code_source() !=
+      second_number.country_code_source()) {
+    return false;
+  }
+  if (first_number.has_preferred_domestic_carrier_code() !=
+      second_number.has_preferred_domestic_carrier_code() ||
+      first_number.preferred_domestic_carrier_code() !=
+      second_number.preferred_domestic_carrier_code()) {
+    return false;
+  }
+  return true;
+}
+
+bool ExactlySameAs(const PhoneNumberDesc& first_number_desc,
+                   const PhoneNumberDesc& second_number_desc) {
+  if (first_number_desc.has_national_number_pattern() !=
+      second_number_desc.has_national_number_pattern() ||
+      first_number_desc.national_number_pattern() !=
+      second_number_desc.national_number_pattern()) {
+    return false;
+  }
+  if (first_number_desc.has_possible_number_pattern() !=
+      second_number_desc.has_possible_number_pattern() ||
+      first_number_desc.possible_number_pattern() !=
+      second_number_desc.possible_number_pattern()) {
+    return false;
+  }
+  if (first_number_desc.has_example_number() !=
+      second_number_desc.has_example_number() ||
+      first_number_desc.example_number() !=
+      second_number_desc.example_number()) {
+    return false;
+  }
+  return true;
+}
+
+}  // namespace phonenumbers
+}  // namespace i18n