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

components/nacl/common/nacl_debug_exception_handler_win.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 "components/nacl/common/nacl_debug_exception_handler_win.h"
 
 #include "base/bind.h"
 #include "base/threading/platform_thread.h"
 #include "base/win/scoped_handle.h"
 #include "native_client/src/public/win/debug_exception_handler.h"
 
 namespace {
 
 class DebugExceptionHandler : public base::PlatformThread::Delegate {
  public:
   DebugExceptionHandler(
       base::Process nacl_process,
       const std::string& startup_info,
       const scoped_refptr<base::MessageLoopProxy>& message_loop,
       const base::Callback<void(bool)>& on_connected)
       : nacl_process_(nacl_process.Pass()),
         startup_info_(startup_info),
         message_loop_(message_loop),
         on_connected_(on_connected) {}
 
-  virtual void ThreadMain() override {
+  void ThreadMain() override {
     // In the Windows API, the set of processes being debugged is
     // thread-local, so we have to attach to the process (using
     // DebugActiveProcess()) on the same thread on which
     // NaClDebugExceptionHandlerRun() receives debug events for the
     // process.
     bool attached = false;
     int pid = nacl_process_.Pid();
     if (nacl_process_.IsValid()) {
       DCHECK(pid);
       if (!DebugActiveProcess(pid)) {
@@ skipping 33 matching lines @@
     const base::Callback<void(bool)>& on_connected) {
   // The new PlatformThread will take ownership of the
   // DebugExceptionHandler object, which will delete itself on exit.
   DebugExceptionHandler* handler = new DebugExceptionHandler(
       nacl_process.Pass(), startup_info, message_loop, on_connected);
   if (!base::PlatformThread::CreateNonJoinable(0, handler)) {
     on_connected.Run(false);
     delete handler;
   }
 }