1 files changed, 2 insertions, 2 deletions
diff --git a/chrome/browser/extensions/external_pref_extension_provider.cc b/chrome/browser/extensions/external_pref_extension_provider.cc
index cc4b031..f2ea35a 100644
--- a/chrome/browser/extensions/external_pref_extension_provider.cc
+++ b/chrome/browser/extensions/external_pref_extension_provider.cc
@@ -31,7 +31,7 @@ ExternalPrefExtensionProvider::~ExternalPrefExtensionProvider() {
 }
 
 void ExternalPrefExtensionProvider::SetPreferencesForTesting(
-    std::string json_data_for_testing) {
+    const std::string& json_data_for_testing) {
   JSONStringValueSerializer serializer(json_data_for_testing);
   SetPreferences(&serializer);
 }
@@ -81,7 +81,7 @@ void ExternalPrefExtensionProvider::VisitRegisteredExtension(
 }
 
 Version* ExternalPrefExtensionProvider::RegisteredVersion(
-    std::string id, Extension::Location* location) const {
+    const std::string& id, Extension::Location* location) const {
   DictionaryValue* extension = NULL;
   if (!prefs_->GetDictionary(ASCIIToWide(id), &extension))
     return NULL;