Get main frame and subframe AppCache loads to work.

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/common/resource_request.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(
-      std::unique_ptr<ResourceRequest> request);
+      const ResourceRequest& request);
 
   ~AppCacheURLLoaderRequest() override;
 
   // AppCacheRequest overrides.
   // TODO(ananta)
   // Add support to the GetURL() call to return the updated URL while following
   // a chain of redirects.
   const GURL& GetURL() const override;
   const std::string& GetMethod() const override;
   const GURL& GetFirstPartyForCookies() const override;
   const GURL GetReferrer() const override;
   // 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;
 
  protected:
-  explicit AppCacheURLLoaderRequest(std::unique_ptr<ResourceRequest> request);
+  explicit AppCacheURLLoaderRequest(const ResourceRequest& request);
 
  private:
-  std::unique_ptr<ResourceRequest> request_;
+  ResourceRequest request_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheURLLoaderRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_URL_LOADER_REQUEST_H_