apps: Use base::MessageLoop.

apps/app_launch_for_metro_restart_win.cc

Index: apps/app_launch_for_metro_restart_win.cc
diff --git a/apps/app_launch_for_metro_restart_win.cc b/apps/app_launch_for_metro_restart_win.cc
index 1fa0cc9e36ce044a8fe7fa3c38ceb6122953d36d..86bf775ae587b6e7ecbaa373867862a918f3ba03 100644
--- a/apps/app_launch_for_metro_restart_win.cc
+++ b/apps/app_launch_for_metro_restart_win.cc
@@ -76,11 +76,9 @@ void HandleAppLaunchForMetroRestart(Profile* profile) {
   }
 
   const int kRestartAppLaunchDelayMs = 1000;
-  MessageLoop::current()->PostDelayedTask(
+  base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
-      base::Bind(&LaunchAppWithId,
-                 profile,
-                 extension_id),
+      base::Bind(&LaunchAppWithId, profile, extension_id),
       base::TimeDelta::FromMilliseconds(kRestartAppLaunchDelayMs));
 }