Add support for subresource request fallback in AppCache for the network service..

content/browser/appcache/appcache_url_loader_request.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_REQUEST_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_REQUEST_H_
 
 #include "content/browser/appcache/appcache_request.h"
 #include "content/public/common/resource_request.h"
+#include "content/public/common/resource_response.h"
 
 namespace content {
 
 // AppCacheRequest wrapper for the ResourceRequest class for users of
 // URLLoader.
 class CONTENT_EXPORT AppCacheURLLoaderRequest : public AppCacheRequest {
  public:
   // Factory function to create an instance of the AppCacheResourceRequest
   // class.
   static std::unique_ptr<AppCacheURLLoaderRequest> Create(
@@ skipping 12 matching lines @@
   // TODO(ananta)
   // ResourceRequest only identifies the request unlike URLRequest which
   // contains response information as well. We need the following methods to
   // work for AppCache. Look into this.
   bool IsSuccess() const override;
   bool IsCancelled() const override;
   bool IsError() const override;
   int GetResponseCode() const override;
   std::string GetResponseHeaderByName(const std::string& name) const override;
   ResourceRequest* GetResourceRequest() override;
+  AppCacheURLLoaderRequest* AsURLLoaderRequest() override;
+
+  void set_response(const ResourceResponseHead& response) {
+    response_ = response;
+  }
 
  protected:
   explicit AppCacheURLLoaderRequest(const ResourceRequest& request);
 
  private:
   ResourceRequest request_;
+  ResourceResponseHead response_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheURLLoaderRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_REQUEST_H_