Fix cpplint issues

Existing cpplint issues block uploading CLs, fix most of them.

Test: m checkbuild
Change-Id: I3477d388659c93c1ca517c4ad37502e0a71014ad
diff --git a/payload_consumer/extent_map.h b/payload_consumer/extent_map.h
index b275e2d..a985cb5 100644
--- a/payload_consumer/extent_map.h
+++ b/payload_consumer/extent_map.h
@@ -20,10 +20,11 @@
 #include <functional>
 #include <map>
 #include <utility>
+#include <vector>
 
 #include "update_engine/common/utils.h"
-#include "update_engine/payload_generator/extent_utils.h"
 #include "update_engine/payload_generator/extent_ranges.h"
+#include "update_engine/payload_generator/extent_utils.h"
 #include "update_engine/update_metadata.pb.h"
 
 namespace chromeos_update_engine {