Implement host-based deletion for the hostname resolution cache.

chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.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 "chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.h"
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "base/bind.h"
+#include "base/callback.h"
 #include "base/guid.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/language_preferences.h"
@@ skipping 137 matching lines @@
   UMA_HISTOGRAM_BOOLEAN("ChromeOS.SAML.Scraping.VerificationResult", success);
 }
 
 // The Task posted to PostTaskAndReply in StartClearingDnsCache on the IO
 // thread.
 void ClearDnsCache(IOThread* io_thread) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (browser_shutdown::IsTryingToQuit())
     return;
 
-  io_thread->ClearHostCache();
+  io_thread->ClearHostCache(base::Callback<bool(const std::string&)>());
 }
 
 void PushFrontIMIfNotExists(const std::string& input_method,
                             std::vector<std::string>* input_methods) {
   if (input_method.empty())
     return;
 
   if (!base::ContainsValue(*input_methods, input_method))
     input_methods->insert(input_methods->begin(), input_method);
 }
@@ skipping 662 matching lines @@
 bool GaiaScreenHandler::IsRestrictiveProxy() const {
   return !disable_restrictive_proxy_check_for_test_ &&
          !IsOnline(captive_portal_status_);
 }
 
 void GaiaScreenHandler::DisableRestrictiveProxyCheckForTest() {
   disable_restrictive_proxy_check_for_test_ = true;
 }
 
 }  // namespace chromeos