Standardize usage of virtual/override/final in content/browser/

content/browser/device_sensors/data_fetcher_shared_memory_base.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 "content/browser/device_sensors/data_fetcher_shared_memory_base.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/threading/thread.h"
@@ skipping 18 matching lines @@
       NOTREACHED();
   }
   return 0;
 }
 
 }  // namespace
 
 class DataFetcherSharedMemoryBase::PollingThread : public base::Thread {
  public:
   PollingThread(const char* name, DataFetcherSharedMemoryBase* fetcher);
-  virtual ~PollingThread();
+  ~PollingThread() override;
 
   void AddConsumer(ConsumerType consumer_type, void* buffer);
   void RemoveConsumer(ConsumerType consumer_type);
 
   unsigned GetConsumersBitmask() const { return consumers_bitmask_; }
   bool IsTimerRunning() const { return timer_ ? timer_->IsRunning() : false; }
 
  private:
   void DoPoll();
 
@@ skipping 192 matching lines @@
 
 base::MessageLoop* DataFetcherSharedMemoryBase::GetPollingMessageLoop() const {
   return polling_thread_ ? polling_thread_->message_loop() : NULL;
 }
 
 bool DataFetcherSharedMemoryBase::IsPollingTimerRunningForTesting() const {
   return polling_thread_ ? polling_thread_->IsTimerRunning() : false;
 }
 
 }  // namespace content