[presubmit] Enabling readability/inheritance linter checking.

test/unittests/libplatform/task-queue-unittest.cc

 // Copyright 2014 the V8 project 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 "include/v8-platform.h"
 #include "src/base/platform/platform.h"
 #include "src/libplatform/task-queue.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using testing::InSequence;
 using testing::IsNull;
 using testing::StrictMock;
 
 namespace v8 {
 namespace platform {
 
 namespace {
 
 struct MockTask : public Task {
   MOCK_METHOD0(Run, void());
 };
 
 
 class TaskQueueThread final : public base::Thread {
  public:
   explicit TaskQueueThread(TaskQueue* queue)
       : Thread(Options("libplatform TaskQueueThread")), queue_(queue) {}
 
-  virtual void Run() override { EXPECT_THAT(queue_->GetNext(), IsNull()); }
+  void Run() override { EXPECT_THAT(queue_->GetNext(), IsNull()); }
 
  private:
   TaskQueue* queue_;
 };
 
 }  // namespace
 
 
 TEST(TaskQueueTest, Basic) {
   TaskQueue queue;
@@ skipping 11 matching lines @@
   TaskQueueThread thread2(&queue);
   thread1.Start();
   thread2.Start();
   queue.Terminate();
   thread1.Join();
   thread2.Join();
 }
 
 }  // namespace platform
 }  // namespace v8