Standardize usage of virtual/override/final in chrome/browser/speech

chrome/browser/speech/chrome_speech_recognition_manager_delegate.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 "chrome/browser/speech/chrome_speech_recognition_manager_delegate.h"
 
 #include <set>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 170 matching lines @@
 
     registrar_->Add(this,
                     content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
                     content::Source<WebContents>(web_contents));
     registrar_->Add(this,
                     content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
                     content::Source<WebContents>(web_contents));
   }
 
   // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) override {
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     DCHECK(type == content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED ||
            type == content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED);
 
     WebContents* web_contents = content::Source<WebContents>(source).ptr();
     std::vector<WebContentsInfo>::iterator iter = FindWebContents(web_contents);
     DCHECK(iter != registered_web_contents_.end());
     int render_process_id = iter->render_process_id;
     int render_view_id = iter->render_view_id;
     registered_web_contents_.erase(iter);
@@ skipping 19 matching lines @@
 
     ~WebContentsInfo() {}
 
     content::WebContents* web_contents;
     int render_process_id;
     int render_view_id;
   };
 
   friend class base::RefCountedThreadSafe<TabWatcher>;
 
-  virtual ~TabWatcher() {
+  ~TabWatcher() override {
     // Must be destroyed on the UI thread due to |registrar_| non thread-safety.
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   }
 
   // Helper function to find the iterator in |registered_web_contents_| which
   // contains |web_contents|.
   std::vector<WebContentsInfo>::iterator FindWebContents(
       content::WebContents* web_contents) {
     for (std::vector<WebContentsInfo>::iterator i(
          registered_web_contents_.begin());
@@ skipping 199 matching lines @@
   // Otherwise this should be a regular tab contents.
   allowed = true;
   check_permission = true;
 #endif
 
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(callback, check_permission, allowed));
 }
 
 }  // namespace speech