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

content/browser/appcache/appcache_url_loader_job.h

 // 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.
 
 #ifndef CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 94 matching lines @@
   void SetSubresourceLoadInfo(
       std::unique_ptr<SubresourceLoadInfo> subresource_load_info,
       URLLoaderFactoryGetter* default_url_loader);
 
   // Ownership of the |handler| is transferred to us via this call. This is
   // only for subresource requests.
   void set_request_handler(std::unique_ptr<AppCacheRequestHandler> handler) {
     sub_resource_handler_ = std::move(handler);
   }
 
+  // Binds to the URLLoaderClient instance passed in via the |client|

[yzshen1, 2017/07/24 17:48:54]

The naming and comment are a little confusing: this method actually binds
|request|, not |client|.

[ananta, 2017/07/24 18:53:18]

Thanks. Renamed to BindRequest

+  // parameter.
+  void BindToClient(mojom::URLLoaderClientPtr client,
+                    mojom::URLLoaderRequest request);
+
  protected:
   // AppCacheJob::Create() creates this instance.
   friend class AppCacheJob;
 
   AppCacheURLLoaderJob(const ResourceRequest& request,
                        AppCacheURLLoaderRequest* appcache_request,
                        AppCacheStorage* storage);
 
   // AppCacheStorage::Delegate methods
   void OnResponseInfoLoaded(AppCacheResponseInfo* response_info,
@@ skipping 87 matching lines @@
   // The AppCacheURLLoaderRequest instance. We use this to set the response
   // info when we receive it.
   AppCacheURLLoaderRequest* appcache_request_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheURLLoaderJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_JOB_H_