Fix lint errors in c/b/c/arc and components/arc.

BUG=None
TEST=Ran cpplint.py to all files under the directories.

Change-Id: I91c5556b56c53ae4c66f6e288d3b6c37dea017ed
Reviewed-on: https://chromium-review.googlesource.com/702080
Reviewed-by: Luis Hector Chavez <[email protected]>
Commit-Queue: Hidehiko Abe <[email protected]>
Cr-Commit-Position: refs/heads/master@{#506765}
diff --git a/components/arc/arc_data_remover_unittest.cc b/components/arc/arc_data_remover_unittest.cc
index 4e3a974..175026bc 100644
--- a/components/arc/arc_data_remover_unittest.cc
+++ b/components/arc/arc_data_remover_unittest.cc
@@ -4,6 +4,8 @@
 
 #include "components/arc/arc_data_remover.h"
 
+#include <memory>
+
 #include "base/bind.h"
 #include "base/test/scoped_task_environment.h"
 #include "chromeos/cryptohome/cryptohome_parameters.h"