Standardize usage of virtual/override/final specifiers.

components/suggestions/image_manager_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 "base/files/file_path.h"
 #include "base/run_loop.h"
 #include "components/leveldb_proto/proto_database.h"
 #include "components/leveldb_proto/testing/fake_db.h"
@@ skipping 36 matching lines @@
   MOCK_METHOD1(SetImageFetcherDelegate, void(ImageFetcherDelegate*));
 };
 
 class ImageManagerTest : public testing::Test {
  public:
   ImageManagerTest()
       : mock_image_fetcher_(NULL),
         num_callback_null_called_(0),
         num_callback_valid_called_(0) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     fake_db_ = new FakeDB<ImageData>(&db_model_);
     image_manager_.reset(CreateImageManager(fake_db_));
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     fake_db_ = NULL;
     db_model_.clear();
     image_manager_.reset();
   }
 
   void InitializeDefaultImageMapAndDatabase(ImageManager* image_manager,
                                             FakeDB<ImageData>* fake_db) {
     CHECK(image_manager);
     CHECK(fake_db);
 
@@ skipping 115 matching lines @@
   image_manager_->GetImageForURL(GURL(kTestUrl1),
                                  base::Bind(&ImageManagerTest::OnImageAvailable,
                                             base::Unretained(this), &run_loop));
   run_loop.Run();
 
   EXPECT_EQ(0, num_callback_null_called_);
   EXPECT_EQ(1, num_callback_valid_called_);
 }
 
 }  // namespace suggestions