base: Fix the TODO in string_util.h

content/browser/geolocation/gateway_data_provider_win.cc

Index: content/browser/geolocation/gateway_data_provider_win.cc
diff --git a/content/browser/geolocation/gateway_data_provider_win.cc b/content/browser/geolocation/gateway_data_provider_win.cc
index e3d635ddbac02b042ad93702f080fc816cf6ec61..95483c7b8440fd35535df0aaeca466497e385148 100644
--- a/content/browser/geolocation/gateway_data_provider_win.cc
+++ b/content/browser/geolocation/gateway_data_provider_win.cc
@@ -10,6 +10,7 @@
 #include <set>
 
 #include "base/command_line.h"
+#include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "content/browser/geolocation/empty_device_data_provider.h"
 #include "content/common/content_switches.h"
@@ -21,10 +22,10 @@ string16 MacAsString16(const uint8 mac_as_int[6]) {
   // Format is XX-XX-XX-XX-XX-XX.
   static const wchar_t* const kMacFormatString =
       L"%02x-%02x-%02x-%02x-%02x-%02x";
-  return WideToUTF16(StringPrintf(kMacFormatString,
-                                  mac_as_int[0], mac_as_int[1],
-                                  mac_as_int[2], mac_as_int[3],
-                                  mac_as_int[4], mac_as_int[5]));
+  return WideToUTF16(base::StringPrintf(kMacFormatString,
+                                        mac_as_int[0], mac_as_int[1],
+                                        mac_as_int[2], mac_as_int[3],
+                                        mac_as_int[4], mac_as_int[5]));
 }
 
 void FetchGatewayIps(std::set<IPAddr>* gateway_ips) {