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

chrome/browser/image_holder_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 <string>
 
 #include "chrome/browser/image_holder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const char kIconUrl1[] = "http://www.google.com/icon1.jpg";
 const char kIconUrl2[] = "http://www.google.com/icon2.jpg";
 
 class TestDelegate : public chrome::ImageHolderDelegate {
  public:
   TestDelegate() : on_fetch_complete_called_(false) {}
-  virtual void OnFetchComplete() override {
-    on_fetch_complete_called_ = true;
-  }
+  void OnFetchComplete() override { on_fetch_complete_called_ = true; }
   bool on_fetch_complete_called_;
 };
 
 }  // namespace.
 
 namespace chrome {
 
 typedef testing::Test ImageHolderTest;
 
 TEST_F(ImageHolderTest, CreateBitmapFetcherTest) {
@@ skipping 62 matching lines @@
   image_holder2.OnFetchComplete(GURL(kIconUrl2), &bitmap);
   image_holder3.OnFetchComplete(GURL(kIconUrl2), &bitmap);
   image_holder4.OnFetchComplete(GURL(kIconUrl2), &bitmap);
   EXPECT_TRUE(image_holder1.IsFetchingDone());
   EXPECT_TRUE(image_holder2.IsFetchingDone());
   EXPECT_TRUE(image_holder3.IsFetchingDone());
   EXPECT_TRUE(image_holder4.IsFetchingDone());
 }
 
 }  // namespace chrome.