Update from https://crrev.com/304418

cc/resources/task_graph_runner_perftest.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/resources/task_graph_runner.h"
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
@@ skipping 27 matching lines @@
 };
 
 class TaskGraphRunnerPerfTest : public testing::Test {
  public:
   TaskGraphRunnerPerfTest()
       : timer_(kWarmupRuns,
                base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
                kTimeCheckInterval) {}
 
   // Overridden from testing::Test:
-  virtual void SetUp() override {
+  void SetUp() override {
     task_graph_runner_ = make_scoped_ptr(new TaskGraphRunner);
     namespace_token_ = task_graph_runner_->GetNamespaceToken();
   }
-  virtual void TearDown() override { task_graph_runner_ = nullptr; }
+  void TearDown() override { task_graph_runner_ = nullptr; }
 
   void AfterTest(const std::string& test_name) {
     // Format matches chrome/test/perf/perf_test.h:PrintResult
     printf(
         "*RESULT %s: %.2f runs/s\n", test_name.c_str(), timer_.LapsPerSecond());
   }
 
   void RunBuildTaskGraphTest(const std::string& test_name,
                              int num_top_level_tasks,
                              int num_tasks,
@@ skipping 246 matching lines @@
   RunScheduleAndExecuteTasksTest("0_1_0", 0, 1, 0);
   RunScheduleAndExecuteTasksTest("0_32_0", 0, 32, 0);
   RunScheduleAndExecuteTasksTest("2_1_0", 2, 1, 0);
   RunScheduleAndExecuteTasksTest("2_32_0", 2, 32, 0);
   RunScheduleAndExecuteTasksTest("2_1_1", 2, 1, 1);
   RunScheduleAndExecuteTasksTest("2_32_1", 2, 32, 1);
 }
 
 }  // namespace
 }  // namespace cc