Fix existing presubmit errors

This change fixes all files already checked in that now have presubmit
errors.  It also fixes a mistake in PRESUBMIT.sh between the original
version and the line counting version.

Change-Id: Icf5c2f83be99e362d801472ae35fff1e662aff23
Reviewed-on: https://chromium-review.googlesource.com/1197745
Reviewed-by: mark a. foltz <mfoltz@chromium.org>
diff --git a/platform/api/socket.h b/platform/api/socket.h
index 63c2f1d..3c90762 100644
--- a/platform/api/socket.h
+++ b/platform/api/socket.h
@@ -58,4 +58,4 @@
 }  // namespace platform
 }  // namespace openscreen
 
-#endif
+#endif  // PLATFORM_API_SOCKET_H_