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

components/policy/core/common/policy_loader_win.cc

 // Copyright (c) 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 "components/policy/core/common/policy_loader_win.h"
 
 #include <windows.h>
 #include <lm.h>       // For limits.
 #include <ntdsapi.h>  // For Ds[Un]Bind
 #include <rpc.h>      // For struct GUID
@@ skipping 267 matching lines @@
  private:
   bool active_;
   PVOID previous_state_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedDisableWow64Redirection);
 };
 
 // AppliedGPOListProvider implementation that calls actual Windows APIs.
 class WinGPOListProvider : public AppliedGPOListProvider {
  public:
-  virtual ~WinGPOListProvider() {}
+  ~WinGPOListProvider() override {}
 
   // AppliedGPOListProvider:
-  virtual DWORD GetAppliedGPOList(DWORD flags,
-                                  LPCTSTR machine_name,
-                                  PSID sid_user,
-                                  GUID* extension_guid,
-                                  PGROUP_POLICY_OBJECT* gpo_list) override {
+  DWORD GetAppliedGPOList(DWORD flags,
+                          LPCTSTR machine_name,
+                          PSID sid_user,
+                          GUID* extension_guid,
+                          PGROUP_POLICY_OBJECT* gpo_list) override {
     return ::GetAppliedGPOList(flags, machine_name, sid_user, extension_guid,
                                gpo_list);
   }
 
-  virtual BOOL FreeGPOList(PGROUP_POLICY_OBJECT gpo_list) override {
+  BOOL FreeGPOList(PGROUP_POLICY_OBJECT gpo_list) override {
     return ::FreeGPOList(gpo_list);
   }
 };
 
 // The default windows GPO list provider used for PolicyLoaderWin.
 static base::LazyInstance<WinGPOListProvider> g_win_gpo_list_provider =
     LAZY_INSTANCE_INITIALIZER;
 
 // Parses |gpo_dict| according to |schema| and writes the resulting policy
 // settings to |policy| for the given |scope| and |level|.
@@ skipping 372 matching lines @@
 
 void PolicyLoaderWin::OnObjectSignaled(HANDLE object) {
   DCHECK(object == user_policy_changed_event_.handle() ||
          object == machine_policy_changed_event_.handle())
       << "unexpected object signaled policy reload, obj = "
       << std::showbase << std::hex << object;
   Reload(false);
 }
 
 }  // namespace policy