Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/net/net_util_cast.cc

Index: chromecast/net/net_util_cast.cc
diff --git a/chromecast/net/net_util_cast.cc b/chromecast/net/net_util_cast.cc
index f94fe64cb2bb8fb76e5d745e0f1e9c212304cc46..e99731cb4e430e7fdc5fed3bf4ae2246b4a87913 100644
--- a/chromecast/net/net_util_cast.cc
+++ b/chromecast/net/net_util_cast.cc
@@ -14,7 +14,7 @@ namespace chromecast {
 
 base::hash_set<std::string> GetIgnoredInterfaces() {
   base::hash_set<std::string> ignored_interfaces;
-  scoped_ptr<CastSysInfo> sys_info = CreateSysInfo();
+  std::unique_ptr<CastSysInfo> sys_info = CreateSysInfo();
   if (!sys_info->GetApInterface().empty())
     ignored_interfaces.insert(sys_info->GetApInterface());