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/s3_file_operations.h b/aos/events/logging/s3_file_operations.h
index ae94f62..e75e56b 100644
--- a/aos/events/logging/s3_file_operations.h
+++ b/aos/events/logging/s3_file_operations.h
@@ -11,10 +11,10 @@
 
   bool Exists() final { return !object_urls_.empty(); }
 
-  void FindLogs(std::vector<std::string> *files) final;
+  void FindLogs(std::vector<File> *files) final;
 
  private:
-  const std::vector<std::string> object_urls_;
+  const std::vector<File> object_urls_;
 };
 
 }  // namespace aos::logger::internal