[Cleanup] Remove StringPrintf from global namespace

chromeos/network/shill_property_handler.cc

Index: chromeos/network/shill_property_handler.cc
diff --git a/chromeos/network/shill_property_handler.cc b/chromeos/network/shill_property_handler.cc
index fa01cc91a2308f16923a210d9529868c74027299..0e3c77a85dc42c7c1347cc107cbc30b1ec084546 100644
--- a/chromeos/network/shill_property_handler.cc
+++ b/chromeos/network/shill_property_handler.cc
@@ -320,7 +320,7 @@ void ShillPropertyHandler::UpdateAvailableTechnologies(
   available_technologies_.clear();
   network_event_log::AddEntry(
       kLogModule, "AvailableTechnologiesChanged",
-      StringPrintf("Size: %"PRIuS, technologies.GetSize()));
+      base::StringPrintf("Size: %"PRIuS, technologies.GetSize()));
   for (base::ListValue::const_iterator iter = technologies.begin();
        iter != technologies.end(); ++iter) {
     std::string technology;
@@ -335,7 +335,7 @@ void ShillPropertyHandler::UpdateEnabledTechnologies(
   enabled_technologies_.clear();
   network_event_log::AddEntry(
       kLogModule, "EnabledTechnologiesChanged",
-      StringPrintf("Size: %"PRIuS, technologies.GetSize()));
+      base::StringPrintf("Size: %"PRIuS, technologies.GetSize()));
   for (base::ListValue::const_iterator iter = technologies.begin();
        iter != technologies.end(); ++iter) {
     std::string technology;
@@ -350,7 +350,7 @@ void ShillPropertyHandler::UpdateUninitializedTechnologies(
   uninitialized_technologies_.clear();
   network_event_log::AddEntry(
       kLogModule, "UninitializedTechnologiesChanged",
-      StringPrintf("Size: %"PRIuS, technologies.GetSize()));
+      base::StringPrintf("Size: %"PRIuS, technologies.GetSize()));
   for (base::ListValue::const_iterator iter = technologies.begin();
        iter != technologies.end(); ++iter) {
     std::string technology;