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

chrome/browser/android/signin/signin_manager_android.cc

 // Copyright 2013 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 <vector>
 
 #include "chrome/browser/android/signin/signin_manager_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 43 matching lines @@
 class ProfileDataRemover : public BrowsingDataRemover::Observer {
  public:
   ProfileDataRemover(Profile* profile, const base::Closure& callback)
       : callback_(callback),
         origin_loop_(base::MessageLoopProxy::current()),
         remover_(BrowsingDataRemover::CreateForUnboundedRange(profile)) {
     remover_->AddObserver(this);
     remover_->Remove(BrowsingDataRemover::REMOVE_ALL, BrowsingDataHelper::ALL);
   }
 
-  virtual ~ProfileDataRemover() {}
+  ~ProfileDataRemover() override {}
 
   void OnBrowsingDataRemoverDone() override {
     remover_->RemoveObserver(this);
     origin_loop_->PostTask(FROM_HERE, callback_);
     origin_loop_->DeleteSoon(FROM_HERE, this);
   }
 
  private:
   base::Closure callback_;
   scoped_refptr<base::MessageLoopProxy> origin_loop_;
@@ skipping 234 matching lines @@
   return !policy::BrowserPolicyConnector::IsNonEnterpriseUser(username);
 #else
   return false;
 #endif
 }
 
 // static
 bool SigninManagerAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }