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

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
diff --git a/content/browser/tab_contents/tab_contents.cc b/content/browser/tab_contents/tab_contents.cc
index 344e1cbcc3bf6e99e0249100f5a5272ebbf1a315..67a527321c80f4a6fe7091a91794e9bd83942e62 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -397,6 +397,8 @@ TabContents::~TabContents() {
   }
 
   FOR_EACH_OBSERVER(TabContentsObserver, observers_, set_tab_contents(NULL));
+
+  net::NetworkChangeNotifier::RemoveOnlineStateObserver(this);
 }
 
 void TabContents::AddObservers() {
@@ -411,6 +413,7 @@ void TabContents::AddObservers() {
   plugin_observer_.reset(new PluginObserver(this));
   safebrowsing_detection_host_.reset(new safe_browsing::ClientSideDetectionHost(
       this));
+  net::NetworkChangeNotifier::AddOnlineStateObserver(this);
 }
 
 bool TabContents::OnMessageReceived(const IPC::Message& message) {
@@ -2861,6 +2864,11 @@ void TabContents::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
   rwh_view->SetSize(view()->GetContainerSize());
 }
 
+void TabContents::OnOnlineStateChanged(bool online) {
+  render_view_host()->Send(new ViewMsg_NetworkStateChanged(
+      render_view_host()->routing_id(), online));
+}
+
 bool TabContents::MaybeUsePreloadedPage(const GURL& url) {
   prerender::PrerenderManager* pm = profile()->GetPrerenderManager();
   if (pm != NULL) {