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 6f93e148d676bf1185b2b7155fcadb571f9fb179..40ed3a4999b34edefe1c7e85933aca74c67a43d3 100644
--- a/content/browser/tab_contents/tab_contents.cc
+++ b/content/browser/tab_contents/tab_contents.cc
@@ -395,6 +395,8 @@ TabContents::~TabContents() {
   }
 
   FOR_EACH_OBSERVER(TabContentsObserver, observers_, set_tab_contents(NULL));
+
+  net::NetworkChangeNotifier::RemoveOnlineStateObserver(this);
 }
 
 void TabContents::AddObservers() {
@@ -409,6 +411,7 @@ 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) {
@@ -2852,6 +2855,11 @@ 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) {