Expose file size from log file reader classes

Change-Id: Ib826c4405ba78e9e1ab37dfd1893d67fc08a7522
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/aos/events/logging/single_node_merge.cc b/aos/events/logging/single_node_merge.cc
index afb88af..aee2c5e 100644
--- a/aos/events/logging/single_node_merge.cc
+++ b/aos/events/logging/single_node_merge.cc
@@ -20,8 +20,7 @@
 namespace chrono = std::chrono;
 
 int Main(int argc, char **argv) {
-  const std::vector<std::string> unsorted_logfiles = FindLogs(argc, argv);
-  const LogFilesContainer log_files(SortParts(unsorted_logfiles));
+  const LogFilesContainer log_files(SortParts(FindLogs(argc, argv)));
   const Configuration *config = log_files.config();
 
   // Haven't tested this on a single node log, and don't really see a need to