Update for libbase.

StringPrintf and the string based file I/O are being moved to libbase.

Change-Id: I765d9e53f65a76d318d9d0d9503403fc092254d5
diff --git a/server/RouteController.cpp b/server/RouteController.cpp
index b47acd4..736aa74 100644
--- a/server/RouteController.cpp
+++ b/server/RouteController.cpp
@@ -30,12 +30,14 @@
 #include "Fwmark.h"
 #include "UidRanges.h"
 
+#include "base/file.h"
 #define LOG_TAG "Netd"
 #include "log/log.h"
 #include "logwrap/logwrap.h"
-#include "utils/file.h"
 #include "resolv_netid.h"
 
+using android::base::WriteStringToFile;
+
 namespace {
 
 // BEGIN CONSTANTS --------------------------------------------------------------------------------
@@ -164,7 +166,7 @@
         addTableName(entry.second, entry.first, &contents);
     }
 
-    if (!android::WriteStringToFile(contents, RT_TABLES_PATH, RT_TABLES_MODE, AID_SYSTEM, AID_WIFI)) {
+    if (!WriteStringToFile(contents, RT_TABLES_PATH, RT_TABLES_MODE, AID_SYSTEM, AID_WIFI)) {
         ALOGE("failed to write to %s (%s)", RT_TABLES_PATH, strerror(errno));
         return;
     }