Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/browser/cast_net_log.h

Index: chromecast/browser/cast_net_log.h
diff --git a/chromecast/browser/cast_net_log.h b/chromecast/browser/cast_net_log.h
index b592cafd8739fd31e66af9e5a635c0a89e796f93..fe3e4b330165cd85fac079f2691d58a241cb7c75 100644
--- a/chromecast/browser/cast_net_log.h
+++ b/chromecast/browser/cast_net_log.h
@@ -5,10 +5,10 @@
 #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 {
@@ -19,7 +19,7 @@ class CastNetLog : public net::NetLog {
   ~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);
 };