Implement host-based deletion for the hostname resolution cache.

chrome/browser/io_thread.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 "chrome/browser/io_thread.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 730 matching lines @@
   UpdateNegotiateDisableCnameLookup();
   UpdateNegotiateEnablePort();
 #if defined(OS_ANDROID)
   UpdateAndroidAuthNegotiateAccountType();
 #endif
   globals_->http_auth_handler_factory =
       net::HttpAuthHandlerRegistryFactory::Create(
           globals_->http_auth_preferences.get(), globals_->host_resolver.get());
 }
 
-void IOThread::ClearHostCache() {
+void IOThread::ClearHostCache(
+    const base::Callback<bool(const std::string&)>& host_filter) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   net::HostCache* host_cache = globals_->host_resolver->GetHostCache();
   if (host_cache)
-    host_cache->clear();
+    host_cache->ClearForHosts(host_filter);
 }
 
 const net::HttpNetworkSession::Params& IOThread::NetworkSessionParams() const {
   return params_;
 }
 
 base::TimeTicks IOThread::creation_time() const {
   return creation_time_;
 }
 
 net::SSLConfigService* IOThread::GetSSLConfigService() {
   return ssl_config_service_manager_->Get();
 }
 
 void IOThread::ChangedToOnTheRecordOnIOThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // Clear the host cache to avoid showing entries from the OTR session
   // in about:net-internals.
-  ClearHostCache();
+  ClearHostCache(base::Callback<bool(const std::string&)>());
 }
 
 void IOThread::InitSystemRequestContext() {
   if (system_url_request_context_getter_.get())
     return;
   // If we're in unit_tests, IOThread may not be run.
   if (!BrowserThread::IsMessageLoopValid(BrowserThread::IO))
     return;
   system_proxy_config_service_ = ProxyServiceFactory::CreateProxyConfigService(
       pref_proxy_config_tracker_.get());
@@ skipping 269 matching lines @@
   // TODO(rtenneti): We should probably use HttpServerPropertiesManager for the
   // system URLRequestContext too. There's no reason this should be tied to a
   // profile.
   return context;
 }
 
 const metrics::UpdateUsagePrefCallbackType&
 IOThread::GetMetricsDataUseForwarder() {
   return metrics_data_use_forwarder_;
 }