Reusing the base::StringPairs in src/components/*

components/leveldb_proto/proto_database_impl.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_LEVELDB_PROTO_PROTO_DATABASE_IMPL_H_
 #define COMPONENTS_LEVELDB_PROTO_PROTO_DATABASE_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_checker.h"
+#include "base/strings/string_split.h"
 #include "components/leveldb_proto/leveldb_database.h"
 #include "components/leveldb_proto/proto_database.h"
 
 namespace leveldb_proto {
 
-typedef std::vector<std::pair<std::string, std::string> > KeyValueVector;
+typedef base::StringPairs KeyValueVector;
 typedef std::vector<std::string> KeyVector;
 
 // When the ProtoDatabaseImpl instance is deleted, in-progress asynchronous
 // operations will be completed and the corresponding callbacks will be called.
 // Construction/calls/destruction should all happen on the same thread.
 template <typename T>
 class ProtoDatabaseImpl : public ProtoDatabase<T> {
  public:
   // All blocking calls/disk access will happen on the provided |task_runner|.
   explicit ProtoDatabaseImpl(
@@ skipping 160 matching lines @@
   task_runner_->PostTaskAndReply(
       FROM_HERE, base::Bind(LoadEntriesFromTaskRunner<T>,
                             base::Unretained(db_.get()), entries_ptr, success),
       base::Bind(RunLoadCallback<T>, callback, base::Owned(success),
                  base::Passed(&entries)));
 }
 
 }  // namespace leveldb_proto
 
 #endif  // COMPONENTS_LEVELDB_PROTO_PROTO_DATABASE_IMPL_H_