Introduce an extension parameter which is used to customize the extension. It's available for exter…

chrome/browser/media_galleries/media_galleries_test_util.cc

Index: chrome/browser/media_galleries/media_galleries_test_util.cc
diff --git a/chrome/browser/media_galleries/media_galleries_test_util.cc b/chrome/browser/media_galleries/media_galleries_test_util.cc
index fe61ee6f5100cc8c8b65ccc62fb80247322ed89a..bf39a1874384cc0b58e4207bbac767a8fbc33886 100644
--- a/chrome/browser/media_galleries/media_galleries_test_util.cc
+++ b/chrome/browser/media_galleries/media_galleries_test_util.cc
@@ -77,7 +77,8 @@ scoped_refptr<extensions::Extension> AddMediaGalleriesApp(
       extension.get(),
       extensions::Extension::ENABLED,
       false,
-      syncer::StringOrdinal::CreateInitialOrdinal());
+      syncer::StringOrdinal::CreateInitialOrdinal(),
+      std::string());
   ExtensionService* extension_service =
       extensions::ExtensionSystem::Get(profile)->extension_service();
   extension_service->AddExtension(extension.get());