Standardize usage of virtual/override/final in extensions/

extensions/browser/api/bluetooth_low_energy/bluetooth_low_energy_apitest.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 "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "device/bluetooth/test/mock_bluetooth_adapter.h"
 #include "device/bluetooth/test/mock_bluetooth_device.h"
 #include "device/bluetooth/test/mock_bluetooth_gatt_characteristic.h"
 #include "device/bluetooth/test/mock_bluetooth_gatt_connection.h"
@@ skipping 77 matching lines @@
 const char kTestDescriptorId1[] = "desc_id1";
 const char kTestDescriptorUuid1[] = "1222";
 const uint8 kTestDescriptorDefaultValue1[] = {0x04, 0x05};
 
 class BluetoothLowEnergyApiTest : public ExtensionApiTest {
  public:
   BluetoothLowEnergyApiTest() {}
 
   virtual ~BluetoothLowEnergyApiTest() {}
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
     empty_extension_ = extensions::test_util::CreateEmptyExtension();
     SetUpMocks();
   }
 
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     EXPECT_CALL(*mock_adapter_, RemoveObserver(_));
   }
 
   void SetUpMocks() {
     mock_adapter_ = new testing::StrictMock<MockBluetoothAdapter>();
     EXPECT_CALL(*mock_adapter_, GetDevices())
         .WillOnce(Return(BluetoothAdapter::ConstDeviceList()));
 
     event_router()->SetAdapterForTesting(mock_adapter_);
 
@@ skipping 1199 matching lines @@
   event_router()->GattCharacteristicRemoved(mock_adapter_, chrc2_.get());
   event_router()->GattCharacteristicRemoved(mock_adapter_, chrc1_.get());
   event_router()->GattCharacteristicRemoved(mock_adapter_, chrc0_.get());
   event_router()->GattServiceRemoved(
       mock_adapter_, device0_.get(), service1_.get());
   event_router()->GattServiceRemoved(
       mock_adapter_, device0_.get(), service0_.get());
 }
 
 }  // namespace