Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

chrome/browser/extensions/activity_log/activity_log_unittest.cc

Index: chrome/browser/extensions/activity_log/activity_log_unittest.cc
diff --git a/chrome/browser/extensions/activity_log/activity_log_unittest.cc b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
index 265e8669c1802766b6cb0a0993c3713988eee92b..3c7dadc1b484873fbaf0b45f5528f25b920a18f8 100644
--- a/chrome/browser/extensions/activity_log/activity_log_unittest.cc
+++ b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
@@ -237,7 +237,7 @@ TEST_F(RenderViewActivityLogTest, LogPrerender) {
                        .Set("version", "1.0.0")
                        .Set("manifest_version", 2))
           .Build();
-  extension_service_->AddExtension(extension);
+  extension_service_->AddExtension(extension.get());
   ActivityLog* activity_log = ActivityLog::GetInstance(profile());
   ASSERT_TRUE(activity_log->IsLogEnabled());
   GURL url("http://www.google.com");