Plumb through NetworkChangeNotifier::IsOffline() to WebKit, enabling

net/proxy/proxy_service.cc

 // Copyright (c) 2010 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 "net/proxy/proxy_service.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 366 matching lines @@
                            NetLog* net_log)
     : resolver_(resolver),
       next_config_id_(1),
       ALLOW_THIS_IN_INITIALIZER_LIST(init_proxy_resolver_callback_(
           this, &ProxyService::OnInitProxyResolverComplete)),
       current_state_(STATE_NONE) ,
       net_log_(net_log),
       stall_proxy_auto_config_delay_(
           base::TimeDelta::FromMilliseconds(
               kNumMillisToStallAfterNetworkChanges)) {
-  NetworkChangeNotifier::AddObserver(this);
+  NetworkChangeNotifier::AddIPAddressObserver(this);
   ResetConfigService(config_service);
 }
 
 // static
 ProxyService* ProxyService::CreateUsingV8ProxyResolver(
     ProxyConfigService* proxy_config_service,
     size_t num_pac_threads,
     ProxyScriptFetcher* proxy_script_fetcher,
     HostResolver* host_resolver,
     NetLog* net_log) {
@@ skipping 155 matching lines @@
   if (config_.HasAutomaticSettings())
     return ERR_IO_PENDING;  // Must submit the request to the proxy resolver.
 
   // Use the manual proxy settings.
   config_.proxy_rules().Apply(url, result);
   result->config_id_ = config_.id();
   return OK;
 }
 
 ProxyService::~ProxyService() {
-  NetworkChangeNotifier::RemoveObserver(this);
+  NetworkChangeNotifier::RemoveIPAddressObserver(this);
   config_service_->RemoveObserver(this);
 
   // Cancel any inprogress requests.
   for (PendingRequests::iterator it = pending_requests_.begin();
        it != pending_requests_.end();
        ++it) {
     (*it)->Cancel();
   }
 }
 
@@ skipping 369 matching lines @@
     OnCompletion(result_);
   }
 }
 
 void SyncProxyServiceHelper::OnCompletion(int rv) {
   result_ = rv;
   event_.Signal();
 }
 
 }  // namespace net