Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/drive.

chrome/browser/chromeos/drive/change_list_loader.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 "chrome/browser/chromeos/drive/change_list_loader.h"
 
 #include <set>
 
 #include "base/callback.h"
 #include "base/callback_helpers.h"
@@ skipping 27 matching lines @@
 namespace {
 
 // Fetches all the (currently available) resource entries from the server.
 class FullFeedFetcher : public ChangeListLoader::FeedFetcher {
  public:
   explicit FullFeedFetcher(JobScheduler* scheduler)
       : scheduler_(scheduler),
         weak_ptr_factory_(this) {
   }
 
-  virtual ~FullFeedFetcher() {
-  }
+  ~FullFeedFetcher() override {}
 
-  virtual void Run(const FeedFetcherCallback& callback) override {
+  void Run(const FeedFetcherCallback& callback) override {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     DCHECK(!callback.is_null());
 
     // Remember the time stamp for usage stats.
     start_time_ = base::TimeTicks::Now();
 
     // This is full resource list fetch.
     scheduler_->GetAllFileList(
         base::Bind(&FullFeedFetcher::OnFileListFetched,
                    weak_ptr_factory_.GetWeakPtr(), callback));
@@ skipping 42 matching lines @@
 
 // Fetches the delta changes since |start_change_id|.
 class DeltaFeedFetcher : public ChangeListLoader::FeedFetcher {
  public:
   DeltaFeedFetcher(JobScheduler* scheduler, int64 start_change_id)
       : scheduler_(scheduler),
         start_change_id_(start_change_id),
         weak_ptr_factory_(this) {
   }
 
-  virtual ~DeltaFeedFetcher() {
-  }
+  ~DeltaFeedFetcher() override {}
 
-  virtual void Run(const FeedFetcherCallback& callback) override {
+  void Run(const FeedFetcherCallback& callback) override {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     DCHECK(!callback.is_null());
 
     scheduler_->GetChangeList(
         start_change_id_,
         base::Bind(&DeltaFeedFetcher::OnChangeListFetched,
                    weak_ptr_factory_.GetWeakPtr(), callback));
   }
 
  private:
@@ skipping 445 matching lines @@
 
   OnChangeListLoadComplete(error);
 
   FOR_EACH_OBSERVER(ChangeListLoaderObserver,
                     observers_,
                     OnLoadFromServerComplete());
 }
 
 }  // namespace internal
 }  // namespace drive