Standardize usage of virtual/override/final specifiers.

components/feedback/feedback_common_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 "components/feedback/feedback_common.h"
 
 #include "base/bind.h"
 #include "components/feedback/proto/common.pb.h"
 #include "components/feedback/proto/dom.pb.h"
 #include "components/feedback/proto/extension.pb.h"
@@ skipping 10 matching lines @@
 const char kLongLog[] = TEN_LINES TEN_LINES TEN_LINES TEN_LINES TEN_LINES;
 const char kLogsAttachmentName[] = "system_logs.zip";
 }  // namespace
 
 class FeedbackCommonTest : public testing::Test {
  protected:
   FeedbackCommonTest() {
     feedback = scoped_refptr<FeedbackCommon>(new FeedbackCommon());
   }
 
-  virtual ~FeedbackCommonTest() {}
+  ~FeedbackCommonTest() override {}
 
   scoped_refptr<FeedbackCommon> feedback;
   userfeedback::ExtensionSubmit report;
 };
 
 TEST_F(FeedbackCommonTest, TestBasicData) {
   // Test that basic data can be set and propagates to the request.
   feedback->set_category_tag(kOne);
   feedback->set_description(kTwo);
   feedback->set_page_url(kThree);
@@ skipping 28 matching lines @@
   // Add a large and small log, verify that an attachment has been
   // added with the right name.
   feedback->AddLog(kOne, kTwo);
   feedback->AddLog(kThree, kLongLog);
   feedback->CompressLogs();
   feedback->PrepareReport(&report);
 
   EXPECT_EQ(1, report.product_specific_binary_data_size());
   EXPECT_EQ(kLogsAttachmentName, report.product_specific_binary_data(0).name());
 }