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

ppapi/proxy/ppb_x509_certificate_private_proxy.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 "ppapi/proxy/ppb_x509_certificate_private_proxy.h"
 
 #include "ppapi/c/private/ppb_x509_certificate_private.h"
 #include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/private/ppb_x509_certificate_private_shared.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 class X509CertificatePrivate : public PPB_X509Certificate_Private_Shared {
  public:
   X509CertificatePrivate(PP_Instance instance);
-  virtual ~X509CertificatePrivate();
+  ~X509CertificatePrivate() override;
 
-  virtual bool ParseDER(const std::vector<char>& der,
-                        PPB_X509Certificate_Fields* result) override;
+  bool ParseDER(const std::vector<char>& der,
+                PPB_X509Certificate_Fields* result) override;
 
  private:
   void SendToBrowser(IPC::Message* msg);
 
   DISALLOW_COPY_AND_ASSIGN(X509CertificatePrivate);
 };
 
 X509CertificatePrivate::X509CertificatePrivate(PP_Instance instance)
     : PPB_X509Certificate_Private_Shared(OBJECT_IS_PROXY, instance) {
 }
@@ skipping 31 matching lines @@
   return (new X509CertificatePrivate(instance))->GetReference();
 }
 
 bool PPB_X509Certificate_Private_Proxy::OnMessageReceived(
     const IPC::Message& msg) {
   return false;
 }
 
 }  // namespace proxy
 }  // namespace ppapi