Standardize usage of virtual/override/final in components/

components/precache/core/precache_fetcher_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/precache/core/precache_fetcher.h"
 
 #include <list>
 #include <set>
 #include <string>
 
@@ skipping 42 matching lines @@
 
  private:
   // Multiset with one entry for each URL requested.
   std::multiset<GURL> requested_urls_;
 };
 
 class TestPrecacheDelegate : public PrecacheFetcher::PrecacheDelegate {
  public:
   TestPrecacheDelegate() : was_on_done_called_(false) {}
 
-  virtual void OnDone() override {
-    was_on_done_called_ = true;
-  }
+  void OnDone() override { was_on_done_called_ = true; }
 
   bool was_on_done_called() const {
     return was_on_done_called_;
   }
 
  private:
   bool was_on_done_called_;
 };
 
 class PrecacheFetcherTest : public testing::Test {
@@ skipping 225 matching lines @@
   EXPECT_EQ(expected_requested_urls, url_callback_.requested_urls());
 
   EXPECT_TRUE(precache_delegate_.was_on_done_called());
 }
 
 #endif  // PRECACHE_MANIFEST_URL_PREFIX
 
 }  // namespace
 
 }  // namespace precache