Update {virtual,override,final} to follow C++11 style.

chrome/browser/android/omnibox/autocomplete_controller_android.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/android/omnibox/autocomplete_controller_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string16.h"
@@ skipping 55 matching lines @@
 /**
  * A prefetcher class responsible for triggering zero suggest prefetch.
  * The prefetch occurs as a side-effect of calling OnOmniboxFocused() on
  * the AutocompleteController object.
  */
 class ZeroSuggestPrefetcher : public AutocompleteControllerDelegate {
  public:
   explicit ZeroSuggestPrefetcher(Profile* profile);
 
  private:
-  virtual ~ZeroSuggestPrefetcher();
+  ~ZeroSuggestPrefetcher() override;
   void SelfDestruct();
 
   // AutocompleteControllerDelegate:
-  virtual void OnResultChanged(bool default_match_changed) override;
+  void OnResultChanged(bool default_match_changed) override;
 
   scoped_ptr<AutocompleteController> controller_;
   base::OneShotTimer<ZeroSuggestPrefetcher> expire_timer_;
 };
 
 ZeroSuggestPrefetcher::ZeroSuggestPrefetcher(Profile* profile)
     : controller_(new AutocompleteController(
           profile, TemplateURLServiceFactory::GetForProfile(profile), this,
           AutocompleteProvider::TYPE_ZERO_SUGGEST)) {
   // Creating an arbitrary fake_request_source to avoid passing in an invalid
@@ skipping 458 matching lines @@
     return;
 
   // ZeroSuggestPrefetcher deletes itself after it's done prefetching.
   new ZeroSuggestPrefetcher(profile);
 }
 
 // Register native methods
 bool RegisterAutocompleteControllerAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }