Add virtual and OVERRIDE to base/ implementation files

base/threading/sequenced_worker_pool_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 <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 134 matching lines @@
   // Counter of the number of "block" workers that have started.
   size_t started_events_;
 };
 
 class SequencedWorkerPoolTest : public testing::Test {
  public:
   SequencedWorkerPoolTest()
       : pool_owner_(kNumWorkerThreads, "test"),
         tracker_(new TestTracker) {}
 
-  ~SequencedWorkerPoolTest() {}
+  virtual ~SequencedWorkerPoolTest() {}
 
-  virtual void SetUp() {}
+  virtual void SetUp() OVERRIDE {}
 
-  virtual void TearDown() {
+  virtual void TearDown() OVERRIDE {
     pool()->Shutdown();
   }
 
   const scoped_refptr<SequencedWorkerPool>& pool() {
     return pool_owner_.pool();
   }
   TestTracker* tracker() { return tracker_.get(); }
 
   void SetWillWaitForShutdownCallback(const Closure& callback) {
     pool_owner_.SetWillWaitForShutdownCallback(callback);
@@ skipping 359 matching lines @@
   scoped_ptr<SequencedWorkerPoolOwner> pool_owner_;
 };
 
 INSTANTIATE_TYPED_TEST_CASE_P(
     SequencedWorkerPool, TaskRunnerTest,
     SequencedWorkerPoolTaskRunnerTestDelegate);
 
 }  // namespace
 
 }  // namespace base