Standardize usage of virtual/override/final specifiers.

ash/display/mirror_window_controller_unittest.cc

 // Copyright (c) 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 "ash/display/mirror_window_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 13 matching lines @@
 namespace {
 DisplayInfo CreateDisplayInfo(int64 id, const gfx::Rect& bounds) {
   DisplayInfo info(id, base::StringPrintf("x-%d", static_cast<int>(id)), false);
   info.SetBounds(bounds);
   return info;
 }
 
 class MirrorOnBootTest : public test::AshTestBase {
  public:
   MirrorOnBootTest() {}
-  virtual ~MirrorOnBootTest() {}
+  ~MirrorOnBootTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kAshHostWindowBounds, "1+1-300x300,1+301-300x300");
     CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kAshEnableSoftwareMirroring);
     test::AshTestBase::SetUp();
   }
-  virtual void TearDown() override {
-    test::AshTestBase::TearDown();
-  }
+  void TearDown() override { test::AshTestBase::TearDown(); }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MirrorOnBootTest);
 };
 
 }
 
 typedef test::AshTestBase MirrorWindowControllerTest;
 
 #if defined(OS_WIN)
@@ skipping 224 matching lines @@
 
 TEST_F(MirrorOnBootTest, MAYBE_MirrorOnBoot) {
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   EXPECT_TRUE(display_manager->IsMirrored());
   RunAllPendingInMessageLoop();
   test::MirrorWindowTestApi test_api;
   EXPECT_TRUE(test_api.GetHost());
 }
 
 }  // namespace ash