Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/syncapi_internal.cc

Index: sync/internal_api/syncapi_internal.cc
diff --git a/sync/internal_api/syncapi_internal.cc b/sync/internal_api/syncapi_internal.cc
index 5e715d7f76871827713b50cc419bae7474b6de6d..0b3fd9f55c79eb97804c66b6f7b8d25e5fa85c7e 100644
--- a/sync/internal_api/syncapi_internal.cc
+++ b/sync/internal_api/syncapi_internal.cc
@@ -6,8 +6,9 @@
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "sync/protocol/attachments.pb.h"
 #include "sync/protocol/password_specifics.pb.h"
 #include "sync/protocol/sync.pb.h"
@@ -31,7 +32,7 @@ sync_pb::PasswordSpecificsData* DecryptPasswordSpecifics(
   if (!password_specifics.has_encrypted())
     return NULL;
   const sync_pb::EncryptedData& encrypted = password_specifics.encrypted();
-  scoped_ptr<sync_pb::PasswordSpecificsData> data(
+  std::unique_ptr<sync_pb::PasswordSpecificsData> data(
       new sync_pb::PasswordSpecificsData);
   if (!crypto->CanDecrypt(encrypted))
     return NULL;