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

ash/display/projecting_observer_chromeos_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 "ash/display/projecting_observer_chromeos.h"
 
 #include "base/memory/scoped_vector.h"
 #include "chromeos/dbus/fake_power_manager_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/display/chromeos/test/test_display_snapshot.h"
@@ skipping 22 matching lines @@
     outputs.push_back(state);
   }
 
   return outputs;
 }
 
 class ProjectingObserverTest : public testing::Test {
  public:
   ProjectingObserverTest() : observer_(&fake_power_client_) {}
 
-  virtual ~ProjectingObserverTest() {}
+  ~ProjectingObserverTest() override {}
 
  protected:
   chromeos::FakePowerManagerClient fake_power_client_;
   ProjectingObserver observer_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ProjectingObserverTest);
 };
 
 }  // namespace
@@ skipping 117 matching lines @@
 
   // Remove VGA output.
   outputs.erase(outputs.begin() + 1);
   observer_.OnDisplayModeChanged(outputs);
 
   EXPECT_EQ(2, fake_power_client_.num_set_is_projecting_calls());
   EXPECT_FALSE(fake_power_client_.is_projecting());
 }
 
 }  // namespace ash