Standardize usage of virtual/override/final specifiers.

ui/app_list/app_list_item_list_unittest.cc

 // Copyright 2013 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 "ui/app_list/app_list_item_list.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/app_list/app_list_folder_item.h"
@@ skipping 45 matching lines @@
 
 std::string GetItemId(int id) {
   return base::StringPrintf("Item %d", id);
 }
 
 }  // namespace
 
 class AppListItemListTest : public testing::Test {
  public:
   AppListItemListTest() {}
-  virtual ~AppListItemListTest() {}
+  ~AppListItemListTest() override {}
 
   // testing::Test overrides:
-  virtual void SetUp() override {
-    item_list_.AddObserver(&observer_);
-  }
+  void SetUp() override { item_list_.AddObserver(&observer_); }
 
-  virtual void TearDown() override {
-    item_list_.RemoveObserver(&observer_);
-  }
+  void TearDown() override { item_list_.RemoveObserver(&observer_); }
 
  protected:
   AppListItem* FindItem(const std::string& id) {
     return item_list_.FindItem(id);
   }
 
   bool FindItemIndex(const std::string& id, size_t* index) {
     return item_list_.FindItemIndex(id, index);
   }
 
@@ skipping 273 matching lines @@
   EXPECT_TRUE(VerifyItemListOrdinals());
   EXPECT_TRUE(VerifyItemOrder4(2, 0, 3, 1));
   // last -> last
   item_list_.SetItemPosition(item_list_.item_at(3),
                              item_list_.item_at(3)->position().CreateAfter());
   EXPECT_TRUE(VerifyItemListOrdinals());
   EXPECT_TRUE(VerifyItemOrder4(2, 0, 3, 1));
 }
 
 }  // namespace app_list