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/delta_performer.h b/delta_performer.h
index 8fffffb..15c8af3 100644
--- a/delta_performer.h
+++ b/delta_performer.h
@@ -7,6 +7,7 @@
#include <inttypes.h>
+#include <string>
#include <vector>
#include <base/time/time.h>