Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/utility/cast_content_utility_client_simple.cc

Index: chromecast/utility/cast_content_utility_client_simple.cc
diff --git a/chromecast/utility/cast_content_utility_client_simple.cc b/chromecast/utility/cast_content_utility_client_simple.cc
index 01a5dfc85295b07531898350654b583307227f08..9db984e8502cbfb434654e2e9db9b46c3c10b6d7 100644
--- a/chromecast/utility/cast_content_utility_client_simple.cc
+++ b/chromecast/utility/cast_content_utility_client_simple.cc
@@ -8,8 +8,8 @@ namespace chromecast {
 namespace shell {
 
 // static
-scoped_ptr<CastContentUtilityClient> CastContentUtilityClient::Create() {
-  return scoped_ptr<CastContentUtilityClient>();
+std::unique_ptr<CastContentUtilityClient> CastContentUtilityClient::Create() {
+  return std::unique_ptr<CastContentUtilityClient>();
 }
 
 }  // namespace shell