update_engine: fixed warnings from cpplint
Fixed all the cpplint warnings in update engine.
BUG=None
TEST=Unit tests still pass.
Change-Id: I285ae858eec8abe0b26ff203b99a42a200ceb71c
Reviewed-on: https://chromium-review.googlesource.com/204027
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/update_attempter.h b/update_attempter.h
index 82cba8c..007da5b 100644
--- a/update_attempter.h
+++ b/update_attempter.h
@@ -10,6 +10,7 @@
#include <memory>
#include <string>
#include <vector>
+#include <utility>
#include <base/time/time.h>
#include <glib.h>