Convert //tools to use std::unique_ptr

tools/battor_agent/battor_agent_bin.cc

 // Copyright 2015 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.
 
 // This file provides a thin binary wrapper around the BattOr Agent
 // library. This binary wrapper provides a means for non-C++ tracing
 // controllers, such as Telemetry and Android Systrace, to issue high-level
 // tracing commands to the BattOr through an interactive shell.
 //
 // Example usage of how an external trace controller might use this binary:
@@ skipping 277 matching lines @@
  private:
   // Event signaled when an async task has finished executing.
   base::WaitableEvent done_;
 
   // Threads needed for serial communication.
   base::Thread io_thread_;
   base::Thread file_thread_;
   base::Thread ui_thread_;
 
   // The agent capable of asynchronously communicating with the BattOr.
-  scoped_ptr<BattOrAgent> agent_;
+  std::unique_ptr<BattOrAgent> agent_;
 
   std::string trace_output_file_;
 
 };
 
 }  // namespace battor
 
 int main(int argc, char* argv[]) {
   base::AtExitManager exit_manager;
   base::CommandLine::Init(argc, argv);
   battor::BattOrAgentBin bin;
   return bin.Run(argc, argv);
 }