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

chrome/browser/sync/engine/syncapi.cc

Index: chrome/browser/sync/engine/syncapi.cc
diff --git a/chrome/browser/sync/engine/syncapi.cc b/chrome/browser/sync/engine/syncapi.cc
index 3c31f7703591371156ab00378812a3d02703bfcd..07f66035ab17263a53b760c5903d10e16de782e4 100644
--- a/chrome/browser/sync/engine/syncapi.cc
+++ b/chrome/browser/sync/engine/syncapi.cc
@@ -1107,7 +1107,7 @@ const sync_pb::PasswordSpecificsData&
 //////////////////////////////////////////////////////////////////////////
 // SyncManager's implementation: SyncManager::SyncInternal
 class SyncManager::SyncInternal
-    : public net::NetworkChangeNotifier::Observer,
+    : public net::NetworkChangeNotifier::IPAddressObserver,
       public TalkMediator::Delegate,
       public sync_notifier::StateWriter,
       public browser_sync::ChannelEventHandler<syncable::DirectoryChangeEvent>,
@@ -1667,7 +1667,7 @@ bool SyncManager::SyncInternal::Init(
       NewEventListenerHookup(connection_manager()->channel(), this,
           &SyncManager::SyncInternal::HandleServerConnectionEvent));
 
-  net::NetworkChangeNotifier::AddObserver(this);
+  net::NetworkChangeNotifier::AddIPAddressObserver(this);
   // TODO(akalin): CheckServerReachable() can block, which may cause jank if we
   // try to shut down sync.  Fix this.
   core_message_loop_->PostTask(FROM_HERE,
@@ -2159,7 +2159,7 @@ void SyncManager::SyncInternal::Shutdown() {
     core_message_loop_->SetNestableTasksAllowed(old_state);
   }
 
-  net::NetworkChangeNotifier::RemoveObserver(this);
+  net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 
   connection_manager_hookup_.reset();