The Appcache subresource URL factory needs to inform the URLLoaderClient if there is a failure.

content/browser/appcache/appcache_url_loader_job.cc

 // Copyright (c) 2017 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.
 
 #include "content/browser/appcache/appcache_url_loader_job.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/appcache/appcache_histograms.h"
 #include "content/browser/appcache/appcache_subresource_url_factory.h"
 #include "content/browser/appcache/appcache_url_loader_request.h"
@@ skipping 410 matching lines @@
     DCHECK(false);
     NotifyCompleted(net::ERR_FAILED);
   }
   ReadMore();
 }
 
 void AppCacheURLLoaderJob::NotifyCompleted(int error_code) {
   if (storage_.get())
     storage_->CancelDelegateCallbacks(this);
 
-  const net::HttpResponseInfo* http_info = is_range_request()
-                                               ? range_response_info_.get()
-                                               : info_->http_response_info();
+  const net::HttpResponseInfo* http_info =
+      is_range_request() ? range_response_info_.get()
+                         : (info_ ? info_->http_response_info() : nullptr);
 
   ResourceRequestCompletionStatus request_complete_data;
   request_complete_data.error_code = error_code;
 
   // TODO(ananta)
   // Fill other details in the ResourceRequestCompletionStatus structure in
   // case of an error.
   if (!request_complete_data.error_code) {
     request_complete_data.exists_in_cache = http_info->was_cached;
     request_complete_data.completion_time = base::TimeTicks::Now();
     request_complete_data.encoded_body_length =
         is_range_request() ? range_response_info_->headers->GetContentLength()
-                           : info_->response_data_size();
+                           : (info_ ? info_->response_data_size() : 0);
     request_complete_data.decoded_body_length =
         request_complete_data.encoded_body_length;
   }
   client_->OnComplete(request_complete_data);
 }
 
 void AppCacheURLLoaderJob::DisconnectFromNetworkLoader() {
   // Close the pipe to the network loader as we are delivering a fallback
   // response to the client.
   network_loader_client_binding_.Close();
   network_loader_ = nullptr;
 }
 
 }  // namespace content