Update {virtual,override} to follow C++11 style in components.

components/enhanced_bookmarks/image_store_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/enhanced_bookmarks/image_store.h"
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/strings/string_number_conversions.h"
 #include "components/enhanced_bookmarks/image_record.h"
@@ skipping 115 matching lines @@
 // Methods to check if persistence is on or not.
 template <class T> bool ShouldPersist();
 template <> bool ShouldPersist<TestImageStore>() { return false; }
 template <> bool ShouldPersist<PersistentImageStore>() { return true; }
 
 // Test fixture class template for the abstract API.
 template <class T>
 class ImageStoreUnitTest : public PlatformTest {
  protected:
   ImageStoreUnitTest() {}
-  virtual ~ImageStoreUnitTest() {}
+  ~ImageStoreUnitTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     bool success = tempDir_.CreateUniqueTempDir();
     ASSERT_TRUE(success);
     store_.reset(CreateStore<T>(tempDir_));
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (store_ && use_persistent_store())
       store_->ClearAll();
   }
 
   bool use_persistent_store() const { return ShouldPersist<T>(); }
   void ResetStore() { store_.reset(CreateStore<T>(tempDir_)); }
 
   // The directory the database is saved into.
   base::ScopedTempDir tempDir_;
   // The object the fixture is testing, via its base interface.
@@ skipping 173 matching lines @@
   if (this->use_persistent_store()) {
     EXPECT_GE(this->store_->GetStoreSizeInBytes(),  80 * 1024); //  80kb
     EXPECT_LE(this->store_->GetStoreSizeInBytes(), 200 * 1024); // 200kb
   } else {
     EXPECT_GE(this->store_->GetStoreSizeInBytes(), 400 * 1024); // 400kb
     EXPECT_LE(this->store_->GetStoreSizeInBytes(), 500 * 1024); // 500kb
   }
 }
 
 }  // namespace