update_engine: Clean up angle brackets in template types.

C++11 no longer has the angle bracket pitfall in template types.

BUG=None
TEST=`FEATURES=test emerge-$BOARD update_engine`

Change-Id: I0168b9f208ad8e62ae614b8a3b8bcf31c58fa9f2
Reviewed-on: https://chromium-review.googlesource.com/219203
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/update_attempter.h b/update_attempter.h
index 2d274e5..221b7d8 100644
--- a/update_attempter.h
+++ b/update_attempter.h
@@ -392,7 +392,7 @@
   // set back in the middle of an update.
   base::TimeTicks last_notify_time_;
 
-  std::vector<std::shared_ptr<AbstractAction> > actions_;
+  std::vector<std::shared_ptr<AbstractAction>> actions_;
   scoped_ptr<ActionProcessor> processor_;
 
   // External state of the system outside the update_engine process