Standardize usage of virtual/override/final specifiers.

components/dom_distiller/standalone/content_extractor.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 <sstream>
 
 #include "base/command_line.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
@@ skipping 191 matching lines @@
     if (requests.empty()) {
       ADD_FAILURE() << "No valid url provided";
     }
 
     return requests.Pass();
   }
 
  private:
   ContentExtractionRequest(const GURL& url) : url_(url) {}
 
-  virtual void OnArticleUpdated(ArticleDistillationUpdate article_update)
-      override {}
+  void OnArticleUpdated(ArticleDistillationUpdate article_update) override {}
 
-  virtual void OnArticleReady(const DistilledArticleProto* article_proto)
-      override {
+  void OnArticleReady(const DistilledArticleProto* article_proto) override {
     article_proto_ = article_proto;
     CHECK(article_proto->pages_size()) << "Failed extracting " << url_;
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
         finished_callback_);
   }
 
   const DistilledArticleProto* article_proto_;
   scoped_ptr<ViewerHandle> viewer_handle_;
   GURL url_;
   base::Closure finished_callback_;
 };
 
 class ContentExtractor : public ContentBrowserTest {
  public:
   ContentExtractor()
       : pending_tasks_(0),
         max_tasks_(kMaxExtractorTasks),
         next_request_(0),
         output_data_(),
         protobuf_output_stream_(
             new google::protobuf::io::StringOutputStream(&output_data_)) {}
 
   // Change behavior of the default host resolver to avoid DNS lookup errors, so
   // we can make network calls.
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     if (!CommandLine::ForCurrentProcess()->HasSwitch(kDisableDnsSwitch)) {
       EnableDNSLookupForThisTest();
     }
     CHECK(db_dir_.CreateUniqueTempDir());
     AddComponentsResources();
   }
 
-  virtual void TearDownOnMainThread() override {
-    DisableDNSLookupForThisTest();
-  }
+  void TearDownOnMainThread() override { DisableDNSLookupForThisTest(); }
 
  protected:
   // Creates the DomDistillerService and creates and starts the extraction
   // request.
   void Start() {
     content::BrowserContext* context =
         shell()->web_contents()->GetBrowserContext();
     service_ = CreateDomDistillerService(context,
                                          db_dir_.path());
     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
@@ skipping 79 matching lines @@
   std::string output_data_;
   scoped_ptr<google::protobuf::io::StringOutputStream> protobuf_output_stream_;
 };
 
 IN_PROC_BROWSER_TEST_F(ContentExtractor, MANUAL_ExtractUrl) {
   Start();
   base::RunLoop().Run();
 }
 
 }  // namespace dom_distiller