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

chrome/browser/io_thread.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/io_thread.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/debug/leak_tracker.h"
@@ skipping 134 matching lines @@
     return global_host_resolver;
 
   net::MappedHostResolver* remapped_resolver =
       new net::MappedHostResolver(global_host_resolver);
   remapped_resolver->SetRulesFromString(
       command_line.GetSwitchValueASCII(switches::kHostResolverRules));
   return remapped_resolver;
 }
 
 class LoggingNetworkChangeObserver
-    : public net::NetworkChangeNotifier::Observer {
+    : public net::NetworkChangeNotifier::IPAddressObserver {
  public:
   // |net_log| must remain valid throughout our lifetime.
   explicit LoggingNetworkChangeObserver(net::NetLog* net_log)
       : net_log_(net_log) {
-    net::NetworkChangeNotifier::AddObserver(this);
+    net::NetworkChangeNotifier::AddIPAddressObserver(this);
   }
 
   ~LoggingNetworkChangeObserver() {
-    net::NetworkChangeNotifier::RemoveObserver(this);
+    net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
   }
 
   virtual void OnIPAddressChanged() {
     VLOG(1) << "Observed a change to the network IP addresses";
 
     net_log_->AddEntry(net::NetLog::TYPE_NETWORK_IP_ADDRESSES_CHANGED,
                        base::TimeTicks::Now(),
                        net::NetLog::Source(),
                        net::NetLog::PHASE_NONE,
                        NULL);
@@ skipping 367 matching lines @@
 void IOThread::ClearHostCache() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   if (globals_->host_resolver->GetAsHostResolverImpl()) {
     net::HostCache* host_cache =
         globals_->host_resolver.get()->GetAsHostResolverImpl()->cache();
     if (host_cache)
       host_cache->clear();
   }
 }