Standardize usage of virtual/override/final specifiers in base/.

base/task/cancelable_task_tracker_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 "base/task/cancelable_task_tracker.h"
 
 #include <cstddef>
 #include <deque>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 class CancelableTaskTrackerTest : public testing::Test {
  protected:
-  virtual ~CancelableTaskTrackerTest() { RunCurrentLoopUntilIdle(); }
+  ~CancelableTaskTrackerTest() override { RunCurrentLoopUntilIdle(); }
 
   void RunCurrentLoopUntilIdle() {
     RunLoop run_loop;
     run_loop.RunUntilIdle();
   }
 
   CancelableTaskTracker task_tracker_;
 
  private:
   // Needed by CancelableTaskTracker methods.
@@ skipping 300 matching lines @@
 // The death tests below make sure that calling task tracker member
 // functions from a thread different from its owner thread DCHECKs in
 // debug mode.
 
 class CancelableTaskTrackerDeathTest : public CancelableTaskTrackerTest {
  protected:
   CancelableTaskTrackerDeathTest() {
     // The default style "fast" does not support multi-threaded tests.
     ::testing::FLAGS_gtest_death_test_style = "threadsafe";
   }
-
-  virtual ~CancelableTaskTrackerDeathTest() {}
 };
 
 // Duplicated from base/threading/thread_checker.h so that we can be
 // good citizens there and undef the macro.
 #if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
 #define ENABLE_THREAD_CHECKER 1
 #else
 #define ENABLE_THREAD_CHECKER 0
 #endif
 
@@ skipping 65 matching lines @@
   bad_thread.message_loop_proxy()->PostTask(
       FROM_HERE,
       Bind(&MaybeRunDeadlyTaskTrackerMemberFunction,
            Unretained(&task_tracker_),
            Bind(&CancelableTaskTracker::TryCancelAll)));
 
   test_task_runner->RunUntilIdle();
 }
 
 }  // namespace base