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

chromeos/dbus/blocking_method_caller_unittest.cc

 // Copyright (c) 2012 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 "chromeos/dbus/blocking_method_caller.h"
 
 #include <memory>
 
+#include "base/callback.h"
+#include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/task_runner.h"
 #include "dbus/message.h"
 #include "dbus/mock_bus.h"
 #include "dbus/mock_object_proxy.h"
 #include "dbus/object_path.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::Invoke;
 using ::testing::Return;
 
 namespace chromeos {
 
 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();
     return true;
   }
   bool RunsTasksOnCurrentThread() const override { return true; }
 
  protected:
   ~FakeTaskRunner() override {}
 };
 
 }  // namespace
 
@@ skipping 86 matching lines @@
   // Check the response.
   ASSERT_TRUE(response.get());
   dbus::MessageReader reader(response.get());
   std::string text_message;
   ASSERT_TRUE(reader.PopString(&text_message));
   // The text message should be echo'ed back.
   EXPECT_EQ(kHello, text_message);
 }
 
 }  // namespace chromeos