Standardize usage of virtual/override/final in content/browser/

content/browser/renderer_host/render_view_host_browsertest.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/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
@@ skipping 16 matching lines @@
 class RenderViewHostTest : public ContentBrowserTest {
  public:
   RenderViewHostTest() {}
 };
 
 class RenderViewHostTestWebContentsObserver : public WebContentsObserver {
  public:
   explicit RenderViewHostTestWebContentsObserver(WebContents* web_contents)
       : WebContentsObserver(web_contents),
         navigation_count_(0) {}
-  virtual ~RenderViewHostTestWebContentsObserver() {}
+  ~RenderViewHostTestWebContentsObserver() override {}
 
-  virtual void DidNavigateMainFrame(
-      const LoadCommittedDetails& details,
-      const FrameNavigateParams& params) override {
+  void DidNavigateMainFrame(const LoadCommittedDetails& details,
+                            const FrameNavigateParams& params) override {
     observed_socket_address_ = params.socket_address;
     base_url_ = params.base_url;
     ++navigation_count_;
   }
 
   const net::HostPortPair& observed_socket_address() const {
     return observed_socket_address_;
   }
 
   GURL base_url() const {
@@ skipping 103 matching lines @@
 
   // Do something that causes ipc queues to flush and tasks in
   // flight to complete such that we should have received the ACK.
   NavigateToURL(shell(), test_url);
 
   // Verify we have the only remaining reference to the namespace.
   EXPECT_TRUE(session_namespace->HasOneRef());
 }
 
 }  // namespace content