Fix the sim build.
diff --git a/WebKit/android/wds/Connection.h b/WebKit/android/wds/Connection.h
index 495a200..d67179e 100644
--- a/WebKit/android/wds/Connection.h
+++ b/WebKit/android/wds/Connection.h
@@ -26,6 +26,7 @@
 #ifndef WDS_CONNECTION_H
 #define WDS_CONNECTION_H
 
+#include <unistd.h>
 #include <sys/socket.h>
 
 namespace android {