Pass Callback to TaskRunner by value and consume it on invocation (1)

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/users/mock_user_manager.h"
 
+#include "base/callback_helpers.h"
 #include "base/task_runner.h"
 #include "chrome/browser/chromeos/login/users/fake_supervised_user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 
 namespace {
 
 class FakeTaskRunner : public base::TaskRunner {
  public:
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       const base::Closure& task,
+                       base::Closure task,
                        base::TimeDelta delay) override {
-    task.Run();
+    std::move(task).Run();

[sky, 2017/03/22 17:34:11]

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     return true;
   }
   bool RunsTasksOnCurrentThread() const override { return true; }
 
  protected:
   ~FakeTaskRunner() override {}
 };
 
 }  // namespace
 
@@ skipping 107 matching lines @@
 bool MockUserManager::ShouldReportUser(const std::string& user_id) const {
   for (auto* user : user_list_) {
     if (user->GetAccountId().GetUserEmail() == user_id)
       return user->IsAffiliated();
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace chromeos