Migrate base::TaskRunner from Closure to OnceClosure

chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc

Index: chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc
diff --git a/chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc b/chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc
index 5881b69c149478da8efd43decbe2ab039a673fb3..d731dd1a21e3d6394a08c77cbc570b51b6b0f0fd 100644
--- a/chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc
+++ b/chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc
@@ -37,7 +37,7 @@ class FakeTaskRunner : public base::TaskRunner {
  private:
   // base::TaskRunner overrides.
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       base::Closure task,
+                       base::OnceClosure task,
                        base::TimeDelta delay) override {
     std::move(task).Run();
     return true;