C++11 override style change for athena

athena/resource_manager/resource_manager_impl.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 "athena/resource_manager/public/resource_manager.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "athena/activity/public/activity.h"
@@ skipping 13 matching lines @@
 namespace athena {
 namespace {
 
 class ResourceManagerImpl : public ResourceManager,
                             public WindowManagerObserver,
                             public ActivityManagerObserver,
                             public MemoryPressureObserver,
                             public WindowListProviderObserver {
  public:
   ResourceManagerImpl(ResourceManagerDelegate* delegate);
-  virtual ~ResourceManagerImpl();
+  ~ResourceManagerImpl() override;
 
   // ResourceManager:
   virtual void SetMemoryPressureAndStopMonitoring(
       MemoryPressure pressure) override;
   virtual void SetWaitTimeBetweenResourceManageCalls(int time_in_ms) override {
     wait_time_for_resource_deallocation_ =
         base::TimeDelta::FromMilliseconds(time_in_ms);
     // Reset the timeout to force the next resource call to execute immediately.
     next_resource_management_time_ = base::Time::Now();
   }
@@ skipping 435 matching lines @@
 }
 
 ResourceManager::ResourceManager() {}
 
 ResourceManager::~ResourceManager() {
   DCHECK(instance);
   instance = nullptr;
 }
 
 }  // namespace athena