C++11 override style change for athena

athena/extensions/athena_app_delegate_base.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 "athena/extensions/athena_app_delegate_base.h"
 
 #include "athena/activity/public/activity.h"
 #include "athena/activity/public/activity_factory.h"
 #include "athena/env/public/athena_env.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 18 matching lines @@
 }
 
 }  // namespace
 
 // This is a extra step to open a new Activity when a link is simply clicked
 // on an app activity (which usually replaces the content).
 class AthenaAppDelegateBase::NewActivityContentsDelegate
     : public content::WebContentsDelegate {
  public:
   NewActivityContentsDelegate() {}
-  virtual ~NewActivityContentsDelegate() {}
+  ~NewActivityContentsDelegate() override {}
 
   // content::WebContentsDelegate:
-  virtual content::WebContents* OpenURLFromTab(
+  content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) override {
     if (!source)
       return nullptr;
     return OpenURLInActivity(source->GetBrowserContext(), params);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NewActivityContentsDelegate);
 };
@@ skipping 43 matching lines @@
 void AthenaAppDelegateBase::SetTerminatingCallback(
     const base::Closure& callback) {
   if (!terminating_callback_.is_null())
     AthenaEnv::Get()->RemoveTerminatingCallback(terminating_callback_);
   terminating_callback_ = callback;
   if (!terminating_callback_.is_null())
     AthenaEnv::Get()->AddTerminatingCallback(terminating_callback_);
 }
 
 }  // namespace athena