Use OnceClosure in TestPendingTask

cc/test/ordered_simple_task_runner_unittest.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 "cc/test/ordered_simple_task_runner.h"
 
 #include <memory>
 #include <string>
 
 #include "base/cancelable_callback.h"
@@ skipping 30 matching lines @@
   TestOrderablePendingTask b;
   TestOrderablePendingTask c;
 
   EXPECT_EQ(a, a);
   EXPECT_EQ(b, b);
   EXPECT_EQ(c, c);
   EXPECT_LT(a, b);
   EXPECT_LT(b, c);
   EXPECT_LT(a, c);
 
-  TestOrderablePendingTask a2 = a;
-  EXPECT_EQ(a, a2);
+  TestOrderablePendingTask a2 = std::move(a);
   EXPECT_LT(a2, b);
   EXPECT_LT(b, c);
   EXPECT_LT(a2, c);
 }
 
 class OrderedSimpleTaskRunnerTest : public testing::Test {
  public:
   OrderedSimpleTaskRunnerTest()
       : now_src_(new base::SimpleTestTickClock()),
         task_runner_(new OrderedSimpleTaskRunner(now_src_.get(), true)) {}
@@ skipping 373 matching lines @@
 
   task_runner_->SetRunTaskLimit(0);
   RUN_AND_CHECK_RESULT(EXPECT_TRUE, RunUntilTime(run_to), "");
 
   task_runner_->SetRunTaskLimit(100);
   RUN_AND_CHECK_RESULT(EXPECT_FALSE, RunUntilTime(run_to), "4(4ms) 5(5ms)");
   EXPECT_EQ(run_to, now_src_->NowTicks());
 }
 
 }  // namespace cc