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

net/base/host_resolver_impl.h

 // 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.
 
 #ifndef NET_BASE_HOST_RESOLVER_IMPL_H_
 #define NET_BASE_HOST_RESOLVER_IMPL_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 33 matching lines @@
 // Thread safety: This class is not threadsafe, and must only be called
 // from one thread!
 //
 // The HostResolverImpl enforces |max_jobs_| as the maximum number of concurrent
 // threads.
 //
 // Requests are ordered in the queue based on their priority.
 
 class HostResolverImpl : public HostResolver,
                          public base::NonThreadSafe,
-                         public NetworkChangeNotifier::Observer {
+                         public NetworkChangeNotifier::IPAddressObserver {
  public:
   // The index into |job_pools_| for the various job pools. Pools with a higher
   // index have lower priority.
   //
   // Note: This is currently unused, since there is a single pool
   //       for all requests.
   enum JobPoolIndex {
     POOL_NORMAL = 0,
     POOL_COUNT,
   };
@@ skipping 151 matching lines @@
 
   // Adds a pending request |req| to |pool|.
   int EnqueueRequest(JobPool* pool, Request* req);
 
   // Cancels all jobs.
   void CancelAllJobs();
 
   // Aborts all in progress jobs (but might start new ones).
   void AbortAllInProgressJobs();
 
-  // NetworkChangeNotifier::Observer methods:
+  // NetworkChangeNotifier::IPAddressObserver methods:
   virtual void OnIPAddressChanged();
 
   // Cache of host resolution results.
   scoped_ptr<HostCache> cache_;
 
   // Map from hostname to outstanding job.
   JobMap jobs_;
 
   // Maximum number of concurrent jobs allowed, across all pools.
   size_t max_jobs_;
@@ skipping 39 matching lines @@
   HostResolverFlags additional_resolver_flags_;
 
   NetLog* net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HostResolverImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_RESOLVER_IMPL_H_