Correct spec involivng x-user-agent value

Author: BanzaiMan

spec/unit/middleware/user_agent_tracker_spec.rb

@@ -33,7 +33,7 @@ def get(env = {})
     let(:agent) { "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.36 Safari/537.36" }
 
     specify 'without X-User-Agent' do
-      expect_meter("api.v2.user_agent.browser.unknown")
+      expect_meter("api.v2.user_agent.browser.chrome")
       get
     end