Add support for fallback content for the frame. This includes main and subframes.

content/browser/service_worker/service_worker_request_handler.cc

 // Copyright 2014 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/service_worker/service_worker_request_handler.h"
 
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 226 matching lines @@
     const net::URLRequest* request) {
   ServiceWorkerRequestHandler* handler = GetHandler(request);
   return handler ? handler->provider_host_.get() : nullptr;
 }
 
 void ServiceWorkerRequestHandler::MaybeCreateLoader(
     const ResourceRequest& request,
     ResourceContext* resource_context,
     LoaderCallback callback) {
   NOTREACHED();
-  std::move(callback).Run(StartLoaderCallback());
+  std::move(callback).Run(StartLoaderCallback(), ResponseFallback());
 }
 
 void ServiceWorkerRequestHandler::PrepareForCrossSiteTransfer(
     int old_process_id) {
   CHECK(!IsBrowserSideNavigationEnabled());
   if (!provider_host_ || !context_)
     return;
   old_process_id_ = old_process_id;
   old_provider_id_ = provider_host_->provider_id();
   host_for_cross_site_transfer_ = context_->TransferProviderHostOut(
@@ skipping 39 matching lines @@
     ResourceType resource_type)
     : context_(context),
       provider_host_(provider_host),
       blob_storage_context_(blob_storage_context),
       resource_type_(resource_type),
       old_process_id_(0),
       old_provider_id_(kInvalidServiceWorkerProviderId) {
 }
 
 }  // namespace content