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

chrome/browser/ui/cocoa/history_menu_bridge_unittest.mm

 // Copyright (c) 2012 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.
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
@@ skipping 19 matching lines @@
   MockTRS(Profile* profile) : PersistentTabRestoreService(profile, NULL) {}
   MOCK_CONST_METHOD0(entries, const TabRestoreService::Entries&());
 };
 
 class MockBridge : public HistoryMenuBridge {
  public:
   MockBridge(Profile* profile)
       : HistoryMenuBridge(profile),
         menu_([[NSMenu alloc] initWithTitle:@"History"]) {}
 
-  virtual NSMenu* HistoryMenu() override {
-    return menu_.get();
-  }
+  NSMenu* HistoryMenu() override { return menu_.get(); }
 
  private:
   base::scoped_nsobject<NSMenu> menu_;
 };
 
 class HistoryMenuBridgeTest : public CocoaProfileTest {
  public:
 
   virtual void SetUp() {
     CocoaProfileTest::SetUp();
@@ skipping 297 matching lines @@
   image_result.image = gfx::Image::CreateFrom1xBitmap(bitmap);
   GotFaviconData(&item, image_result);
 
   // Make sure the callback works.
   EXPECT_FALSE(item.icon_requested);
   EXPECT_TRUE(item.icon.get());
   EXPECT_TRUE([item.menu_item image]);
 }
 
 }  // namespace