Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/bitmap_fetcher/bitmap_fetcher_browsertest.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.h"
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 14 matching lines @@
 
 namespace chrome {
 
 // Class to catch events from the BitmapFetcher for testing.
 class BitmapFetcherTestDelegate : public BitmapFetcherDelegate {
  public:
   explicit BitmapFetcherTestDelegate(bool async) : called_(false),
                                                    success_(false),
                                                    async_(async) {}
 
-  virtual ~BitmapFetcherTestDelegate() {
-    EXPECT_TRUE(called_);
-  }
+  ~BitmapFetcherTestDelegate() override { EXPECT_TRUE(called_); }
 
   // Method inherited from BitmapFetcherDelegate.
-  virtual void OnFetchComplete(const GURL url,
-                               const SkBitmap* bitmap) override {
+  void OnFetchComplete(const GURL url, const SkBitmap* bitmap) override {
     called_ = true;
     url_ = url;
     if (bitmap) {
       success_ = true;
       bitmap->deepCopyTo(&bitmap_);
     }
     // For async calls, we need to quit the run loop so the test can continue.
     if (async_)
       run_loop_.Quit();
   }
@@ skipping 143 matching lines @@
       net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
       net::LOAD_NORMAL);
 
   // Blocks until test delegate is notified via a callback.
   delegate.Wait();
 
   EXPECT_FALSE(delegate.success());
 }
 
 }  // namespace chrome