Implement offline mode behind a flag

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 3849313958054add332c20ecf097b12344f45395..7ef314ef93195eac78aa535c783171f45c5745a0 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -231,8 +231,9 @@ net::Error CallbackAndReturn(
   return net_error;
 }
 
-int BuildLoadFlagsForRequest(const ResourceHostMsg_Request& request_data,
-                             int child_id, bool is_sync_load) {
+int BuildLoadFlagsForRequest(
+    const ResourceHostMsg_Request& request_data, int child_id,
+    bool is_sync_load) {
   int load_flags = request_data.load_flags;
 
   // Although EV status is irrelevant to sub-frames and sub-resources, we have
@@ -701,6 +702,9 @@ void ResourceDispatcherHostImpl::DidReceiveRedirect(ResourceLoader* loader,
 void ResourceDispatcherHostImpl::DidReceiveResponse(ResourceLoader* loader) {
   ResourceRequestInfoImpl* info = loader->GetRequestInfo();
 
+  offline_policy_.RequestCompleted(info->GetChildID(), info->GetRouteID(),
+                                    loader->request()->response_info());
+
   int render_process_id, render_view_id;
   if (!info->GetAssociatedRenderView(&render_process_id, &render_view_id))
     return;
@@ -933,6 +937,8 @@ void ResourceDispatcherHostImpl::BeginRequest(
   bool is_sync_load = sync_result != NULL;
   int load_flags =
       BuildLoadFlagsForRequest(request_data, child_id, is_sync_load);
+  load_flags |= offline_policy_.GetAdditionalLoadFlags(
+      child_id, route_id, load_flags, request_data.resource_type);
 
   // Construct the request.
   scoped_ptr<net::URLRequest> new_request;
@@ -1368,6 +1374,9 @@ void ResourceDispatcherHostImpl::CancelRequestsForRoute(int child_id,
       CancelBlockedRequestsForRoute(child_id, *iter);
     }
   }
+
+  // Cleanup the offline state for the route.
+  offline_policy_.RouteRemoved(child_id, route_id);
 }
 
 // Cancels the request and removes it from the list.