Standardize usage of virtual/override/final specifiers.

chrome/browser/bitmap_fetcher/bitmap_fetcher_service_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 "chrome/browser/bitmap_fetcher/bitmap_fetcher_service.h"
 
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
 #include "chrome/test/base/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 30 matching lines @@
   chrome::BitmapFetcher* CreateFetcher(const GURL& url) override {
     return new chrome::BitmapFetcher(url, this);
   }
 };
 
 }  // namespace
 
 class BitmapFetcherServiceTest : public testing::Test,
                                  public TestNotificationInterface {
  public:
-  virtual void SetUp() override {
+  void SetUp() override {
     service_.reset(new TestService(&profile_));
     requestsFinished_ = 0;
     imagesChanged_ = 0;
     url1_ = GURL("http://example.org/sample-image-1.png");
     url2_ = GURL("http://example.org/sample-image-2.png");
   }
 
   const ScopedVector<BitmapFetcherRequest>& requests() {
     return service_->requests_;
   }
@@ skipping 101 matching lines @@
   service_->RequestImage(url1_, new TestObserver(this));
   service_->RequestImage(url2_, new TestObserver(this));
   EXPECT_EQ(0U, cache_size());
 
   CompleteFetch(url1_);
   EXPECT_EQ(1U, cache_size());
 
   FailFetch(url2_);
   EXPECT_EQ(1U, cache_size());
 }