Standardize usage of virtual/override/final specifiers.

components/variations/variations_associated_data_unittest.cc

 // Copyright 2013 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 "components/variations/variations_associated_data.h"
 
 #include "base/metrics/field_trial.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace variations {
@@ skipping 32 matching lines @@
       base::FieldTrial::SESSION_RANDOMIZED, default_group_number);
 }
 
 }  // namespace
 
 class VariationsAssociatedDataTest : public ::testing::Test {
  public:
   VariationsAssociatedDataTest() : field_trial_list_(NULL) {
   }
 
-  virtual ~VariationsAssociatedDataTest() {
+  ~VariationsAssociatedDataTest() override {
     // Ensure that the maps are cleared between tests, since they are stored as
     // process singletons.
     testing::ClearAllVariationIDs();
     testing::ClearAllVariationParams();
   }
 
  private:
   base::FieldTrialList field_trial_list_;
 
   DISALLOW_COPY_AND_ASSIGN(VariationsAssociatedDataTest);
@@ skipping 258 matching lines @@
   scoped_refptr<base::FieldTrial> trial(
       CreateFieldTrial(kTrialName, 100, "A", NULL));
   ASSERT_FALSE(IsFieldTrialActive(kTrialName));
 
   std::map<std::string, std::string> params;
   EXPECT_EQ(std::string(), GetVariationParamValue(kTrialName, "x"));
   ASSERT_TRUE(IsFieldTrialActive(kTrialName));
 }
 
 }  // namespace variations