Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/browser/cast_net_log.h

 // 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.
 
 #ifndef CHROMECAST_BROWSER_CAST_NET_LOG_H_
 #define CHROMECAST_BROWSER_CAST_NET_LOG_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "net/log/write_to_file_net_log_observer.h"
 
 namespace chromecast {
 
 class CastNetLog : public net::NetLog {
  public:
   CastNetLog();
   ~CastNetLog() override;
 
  private:
-  scoped_ptr<net::WriteToFileNetLogObserver> write_to_file_observer_;
+  std::unique_ptr<net::WriteToFileNetLogObserver> write_to_file_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(CastNetLog);
 };
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_NET_LOG_H_