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

chrome/browser/io_thread.h

 // 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.
 
 #ifndef CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 127 matching lines @@
   // to the IOThread.  IOThread owns them all, despite not using scoped_ptr.
   // This is because the destructor of IOThread runs on the wrong thread.  All
   // member variables should be deleted in CleanUp().
 
   // These member variables are initialized in Init() and do not change for the
   // lifetime of the IO thread.
 
   Globals* globals_;
 
   // Observer that logs network changes to the ChromeNetLog.
-  scoped_ptr<net::NetworkChangeNotifier::Observer> network_change_observer_;
+  scoped_ptr<net::NetworkChangeNotifier::IPAddressObserver>
+      network_change_observer_;
 
   // Store HTTP Auth-related policies in this thread.
   std::string auth_schemes_;
   bool negotiate_disable_cname_lookup_;
   bool negotiate_enable_port_;
   std::string auth_server_whitelist_;
   std::string auth_delegate_whitelist_;
   std::string gssapi_library_name_;
 
   // These member variables are initialized by a task posted to the IO thread,
   // which gets posted by calling certain member functions of IOThread.
 
   // Note: we user explicit pointers rather than smart pointers to be more
   // explicit about destruction order, and ensure that there is no chance that
   // these observers would be used accidentally after we have begun to tear
   // down.
   chrome_browser_net::ConnectInterceptor* speculative_interceptor_;
   chrome_browser_net::Predictor* predictor_;
 
   // Keeps track of all live ChromeURLRequestContextGetters, so the
   // ChromeURLRequestContexts can be released during
   // IOThread::CleanUpAfterMessageLoopDestruction().
   std::list<ChromeURLRequestContextGetter*> url_request_context_getters_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_