Standardize usage of virtual/override/final in extensions/

extensions/browser/api/usb/usb_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 "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/ui/browser.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_utils.h"
 #include "device/usb/usb_service.h"
 #include "extensions/browser/api/usb/usb_api.h"
@@ skipping 127 matching lines @@
  private:
   MockUsbDeviceHandle* mock_handle_;
   virtual ~MockUsbDevice() {}
 };
 
 class MockUsbService : public UsbService {
  public:
   explicit MockUsbService(scoped_refptr<UsbDevice> device) : device_(device) {}
 
  protected:
-  virtual scoped_refptr<UsbDevice> GetDeviceById(uint32 unique_id) override {
+  scoped_refptr<UsbDevice> GetDeviceById(uint32 unique_id) override {
     EXPECT_EQ(unique_id, 0U);
     return device_;
   }
 
-  virtual void GetDevices(
-      std::vector<scoped_refptr<UsbDevice> >* devices) override {
+  void GetDevices(std::vector<scoped_refptr<UsbDevice>>* devices) override {
     STLClearObject(devices);
     devices->push_back(device_);
   }
 
   scoped_refptr<UsbDevice> device_;
 };
 
 #if defined(OS_WIN)
 #pragma warning(pop)
 #endif
 
 class UsbApiTest : public ExtensionApiTest {
  public:
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     mock_device_handle_ = new MockUsbDeviceHandle();
     mock_device_ = new MockUsbDevice(mock_device_handle_.get());
     scoped_refptr<content::MessageLoopRunner> runner =
         new content::MessageLoopRunner;
     BrowserThread::PostTaskAndReply(BrowserThread::FILE,
                                     FROM_HERE,
                                     base::Bind(&UsbApiTest::SetUpService, this),
                                     runner->QuitClosure());
     runner->Run();
   }
 
   void SetUpService() {
     UsbService::SetInstanceForTest(new MockUsbService(mock_device_));
   }
 
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     scoped_refptr<content::MessageLoopRunner> runner =
         new content::MessageLoopRunner;
     UsbService* service = NULL;
     BrowserThread::PostTaskAndReply(
         BrowserThread::FILE,
         FROM_HERE,
         base::Bind(&UsbService::SetInstanceForTest, service),
         runner->QuitClosure());
     runner->Run();
   }
@@ skipping 69 matching lines @@
       .WillOnce(InvokeUsbTransferCallback<5>(device::USB_TRANSFER_ERROR))
       .WillOnce(InvokeUsbTransferCallback<5>(device::USB_TRANSFER_TIMEOUT));
   EXPECT_CALL(*mock_device_handle_.get(), Close()).Times(AnyNumber());
   ASSERT_TRUE(RunExtensionTest("usb/transfer_failure"));
 }
 
 IN_PROC_BROWSER_TEST_F(UsbApiTest, InvalidLengthTransfer) {
   EXPECT_CALL(*mock_device_handle_.get(), Close()).Times(AnyNumber());
   ASSERT_TRUE(RunExtensionTest("usb/invalid_length_transfer"));
 }