Standardize usage of virtual/override/final in components/

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 68 matching lines @@
     CANCELLED
   };
 
   MockResourceController()
       : status_(UNKNOWN) {
   }
 
   Status status() const { return status_; }
 
   // ResourceController:
-  virtual void Cancel() override {
-    NOTREACHED();
-  }
-  virtual void CancelAndIgnore() override {
-    status_ = CANCELLED;
-  }
-  virtual void CancelWithError(int error_code) override {
-    NOTREACHED();
-  }
-  virtual void Resume() override {
+  void Cancel() override { NOTREACHED(); }
+  void CancelAndIgnore() override { status_ = CANCELLED; }
+  void CancelWithError(int error_code) override { NOTREACHED(); }
+  void Resume() override {
     DCHECK(status_ == UNKNOWN);
     status_ = RESUMED;
   }
 
  private:
   Status status_;
 };
 
 // TestIOThreadState ----------------------------------------------------------
 
@@ skipping 362 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