Remove all remaining traces of MessageLoopProxy.

components/keyed_service/core/refcounted_keyed_service.h

Index: components/keyed_service/core/refcounted_keyed_service.h
diff --git a/components/keyed_service/core/refcounted_keyed_service.h b/components/keyed_service/core/refcounted_keyed_service.h
index 31815d6f8ff506af7cba7b978f9951fd87ed8495..891fc2898666082efb4594ff834f78e72a40d4dc 100644
--- a/components/keyed_service/core/refcounted_keyed_service.h
+++ b/components/keyed_service/core/refcounted_keyed_service.h
@@ -51,7 +51,7 @@ class KEYED_SERVICE_EXPORT RefcountedKeyedService
   // If you need your service to be deleted on a specific thread (for example,
   // you're converting a service that used content::DeleteOnThread<IO>), then
   // use this constructor with a reference to the SingleThreadTaskRunner (you
-  // can get it from content::BrowserThread::GetMessageLoopProxyForThread).
+  // can get it from content::BrowserThread::GetTaskRunnerForThread).
   explicit RefcountedKeyedService(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);