Standardize usage of virtual/override/final specifiers.

components/navigation_interception/intercept_navigation_resource_throttle_unittest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "components/navigation_interception/intercept_navigation_resource_throttle.h"
@@ skipping 166 matching lines @@
 // InterceptNavigationResourceThrottleTest ------------------------------------
 
 class InterceptNavigationResourceThrottleTest
   : public content::RenderViewHostTestHarness {
  public:
   InterceptNavigationResourceThrottleTest()
       : mock_callback_receiver_(new MockInterceptCallbackReceiver()),
         io_thread_state_(NULL) {
   }
 
-  virtual void SetUp() override {
-    RenderViewHostTestHarness::SetUp();
-  }
+  void SetUp() override { RenderViewHostTestHarness::SetUp(); }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (web_contents())
       web_contents()->SetDelegate(NULL);
 
     content::BrowserThread::DeleteSoon(
         content::BrowserThread::IO, FROM_HERE, io_thread_state_);
 
     RenderViewHostTestHarness::TearDown();
   }
 
   void SetIOThreadState(TestIOThreadState* io_thread_state) {
@@ skipping 263 matching lines @@
           REDIRECT_MODE_302,
           web_contents()->GetRenderViewHost()->GetProcess()->GetID(),
           web_contents()->GetMainFrame()->GetRoutingID(),
           base::Unretained(&defer)));
 
   // Wait for the request to finish processing.
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace navigation_interception