update_engine: Run clang-format on ./ (root directory)

BUG=none
TEST=unittest

Change-Id: Ibd075dc7ea9a18e798f612e35725f1c83c112809
Reviewed-on: https://chromium-review.googlesource.com/1409708
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/connection_manager_interface.h b/connection_manager_interface.h
index 2faeb80..9f77989 100644
--- a/connection_manager_interface.h
+++ b/connection_manager_interface.h
@@ -61,7 +61,7 @@
 // Factory function which creates a ConnectionManager.
 std::unique_ptr<ConnectionManagerInterface> CreateConnectionManager(
     SystemState* system_state);
-}
+}  // namespace connection_manager
 
 }  // namespace chromeos_update_engine