Standardize usage of virtual/override/final specifiers.

chrome/browser/predictors/resource_prefetch_predictor_unittest.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 <iostream>
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/time/time.h"
@@ skipping 54 matching lines @@
                                            PrefetchKeyType key_type));
   MOCK_METHOD0(DeleteAllData, void());
 
  protected:
   ~MockResourcePrefetchPredictorTables() { }
 };
 
 class ResourcePrefetchPredictorTest : public testing::Test {
  public:
   ResourcePrefetchPredictorTest();
-  virtual ~ResourcePrefetchPredictorTest();
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  ~ResourcePrefetchPredictorTest() override;
+  void SetUp() override;
+  void TearDown() override;
 
  protected:
   void AddUrlToHistory(const std::string& url, int visit_count) {
     HistoryServiceFactory::GetForProfile(profile_.get(),
                                          Profile::EXPLICIT_ACCESS)->
         AddPageWithDetails(
             GURL(url),
             base::string16(),
             visit_count,
             0,
@@ skipping 828 matching lines @@
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(0)));
   EXPECT_TRUE(URLRequestSummaryAreEqual(
       resource2,
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(1)));
   EXPECT_TRUE(URLRequestSummaryAreEqual(
       resource3,
       predictor_->inflight_navigations_[main_frame1.navigation_id]->at(2)));
 }
 
 }  // namespace predictors