Use base::StringPairs where appropriate from /chrome

chrome/browser/chromeos/drive/resource_metadata_storage_unittest.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/chromeos/drive/resource_metadata_storage.h"
 
 #include <algorithm>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
+#include "base/strings/string_split.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/test_util.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
 
 namespace drive {
 namespace internal {
 
@@ skipping 170 matching lines @@
 
   // Resource ID to local ID mapping is removed.
   EXPECT_EQ(FILE_ERROR_OK, storage_->RemoveEntry(local_id));
   EXPECT_EQ(FILE_ERROR_NOT_FOUND,
             storage_->GetIdByResourceId(resource_id, &id));
 }
 
 TEST_F(ResourceMetadataStorageTest, GetChildren) {
   const std::string parents_id[] = { "mercury", "venus", "mars", "jupiter",
                                      "saturn" };
-  std::vector<std::vector<std::pair<std::string, std::string> > >
-      children_name_id(arraysize(parents_id));
+  std::vector<base::StringPairs> children_name_id(arraysize(parents_id));
   // Skip children_name_id[0/1] here because Mercury and Venus have no moon.
   children_name_id[2].push_back(std::make_pair("phobos", "mars_i"));
   children_name_id[2].push_back(std::make_pair("deimos", "mars_ii"));
   children_name_id[3].push_back(std::make_pair("io", "jupiter_i"));
   children_name_id[3].push_back(std::make_pair("europa", "jupiter_ii"));
   children_name_id[3].push_back(std::make_pair("ganymede", "jupiter_iii"));
   children_name_id[3].push_back(std::make_pair("calisto", "jupiter_iv"));
   children_name_id[4].push_back(std::make_pair("mimas", "saturn_i"));
   children_name_id[4].push_back(std::make_pair("enceladus", "saturn_ii"));
   children_name_id[4].push_back(std::make_pair("tethys", "saturn_iii"));
@@ skipping 409 matching lines @@
   EXPECT_EQ(FILE_ERROR_OK, storage_->RemoveEntry(key3));
   EXPECT_TRUE(CheckValidity());
 
   // Remove key1.
   EXPECT_EQ(FILE_ERROR_OK, storage_->RemoveEntry(key1));
   EXPECT_TRUE(CheckValidity());
 }
 
 }  // namespace internal
 }  // namespace drive