Turn on -Wdelete-non-virtual-dtor for chromeos as well.

chrome/browser/chromeos/user_cros_settings_provider.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/user_cros_settings_provider.h"
 
 #include <map>
 #include <set>
 
 #include "base/hash_tables.h"
@@ skipping 240 matching lines @@
   // upper bound for number of retries to fetch a signed setting.
   static const int kNumRetriesLimit = 9;
 
   UserCrosSettingsTrust()
       : ownership_service_(OwnershipService::GetSharedInstance()),
         retries_left_(kNumRetriesLimit) {
     // Start prefetching Boolean and String preferences.
     Reload();
   }
 
-  ~UserCrosSettingsTrust() {
+  virtual ~UserCrosSettingsTrust() {
     if (BrowserThread::CurrentlyOn(BrowserThread::UI) &&
         CrosLibrary::Get()->EnsureLoaded()) {
       // Cancels all pending callbacks from us.
       SignedSettingsHelper::Get()->CancelCallback(this);
     }
   }
 
   // Called right before boolean property is changed.
   void OnBooleanPropertyChange(const std::string& path, bool new_value) {
     if (path == kSignedDataRoamingEnabled) {
@@ skipping 329 matching lines @@
   if (cached_whitelist_update->Remove(email_value) != -1)
     prefs->ScheduleSavePersistentPrefs();
 }
 
 // static
 void UserCrosSettingsProvider::UpdateCachedOwner(const std::string& email) {
   UpdateCacheString(kDeviceOwner, email, USE_VALUE_SUPPLIED);
 }
 
 }  // namespace chromeos