update_engine: Run clang-format on update_manager/

BUG=none
TEST=unittest

Change-Id: I80b56209d757d1156dd5f55bdd758a1ae8388dcc
Reviewed-on: https://chromium-review.googlesource.com/1409707
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/update_manager/mock_variable.h b/update_manager/mock_variable.h
index 1493491..8b6c276 100644
--- a/update_manager/mock_variable.h
+++ b/update_manager/mock_variable.h
@@ -26,7 +26,7 @@
 namespace chromeos_update_manager {
 
 // This is a generic mock of the Variable class.
-template<typename T>
+template <typename T>
 class MockVariable : public Variable<T> {
  public:
   using Variable<T>::Variable;