Standardize usage of virtual/override/final in components/

components/search_provider_logos/logo_tracker_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/search_provider_logos/logo_tracker.h"
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 259 matching lines @@
     EXPECT_CALL(*this, OnObserverRemoved()).Times(1);
   }
 
   MOCK_METHOD2(OnLogoAvailable, void(const Logo*, bool));
   MOCK_METHOD0(OnObserverRemoved, void());
 };
 
 class TestLogoDelegate : public LogoDelegate {
  public:
   TestLogoDelegate() {}
-  virtual ~TestLogoDelegate() {}
+  ~TestLogoDelegate() override {}
 
-  virtual void DecodeUntrustedImage(
+  void DecodeUntrustedImage(
       const scoped_refptr<base::RefCountedString>& encoded_image,
       base::Callback<void(const SkBitmap&)> image_decoded_callback) override {
     SkBitmap bitmap =
         gfx::Image::CreateFrom1xPNGBytes(encoded_image->front(),
                                          encoded_image->size()).AsBitmap();
     base::MessageLoopProxy::current()->PostTask(
         FROM_HERE, base::Bind(image_decoded_callback, bitmap));
   }
 };
 
@@ skipping 375 matching lines @@
   MockLogoObserver listener2;
   listener2.ExpectFreshLogo(&logo);
   logo_tracker_->GetLogo(&listener2);
 
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace
 
 }  // namespace search_provider_logos