chromeos-dbus-bindings: Fix build break on Chrome OS

Change-Id: Ib18dbd7c67b5aaf9eddef0f646454ea631e6adc7
diff --git a/chromeos-dbus-bindings/proxy_generator.cc b/chromeos-dbus-bindings/proxy_generator.cc
index 8c295ee..ea0d1dc 100644
--- a/chromeos-dbus-bindings/proxy_generator.cc
+++ b/chromeos-dbus-bindings/proxy_generator.cc
@@ -4,6 +4,7 @@
 
 #include "chromeos-dbus-bindings/proxy_generator.h"
 
+#include <algorithm>
 #include <utility>
 
 #include <base/files/file_path.h>