update_engine: Run clang-format on common/

BUG=none
TEST=unittest

Change-Id: Icdaf5017e03a197bc576f08f4b8dcdd00cff217c
Reviewed-on: https://chromium-review.googlesource.com/1407541
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/common/action_pipe_unittest.cc b/common/action_pipe_unittest.cc
index 9bfbc83..233561d 100644
--- a/common/action_pipe_unittest.cc
+++ b/common/action_pipe_unittest.cc
@@ -28,7 +28,7 @@
 
 class ActionPipeTestAction;
 
-template<>
+template <>
 class ActionTraits<ActionPipeTestAction> {
  public:
   typedef string OutputObjectType;
@@ -46,7 +46,7 @@
   string Type() const { return "ActionPipeTestAction"; }
 };
 
-class ActionPipeTest : public ::testing::Test { };
+class ActionPipeTest : public ::testing::Test {};
 
 // This test creates two simple Actions and sends a message via an ActionPipe
 // from one to the other.