Add support in the network service for different contexts.

content/network/cache_url_loader.h

 // Copyright 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_NETWORK_CACHE_URL_LOADER_H_
 #define CONTENT_NETWORK_CACHE_URL_LOADER_H_
 
 #include "content/common/url_loader.mojom.h"
 
 namespace net {
 class URLRequestContext;
 }
 
 namespace content {
 
 // Creates a URLLoader that responds to developer requests to view the cache.
-void StartCacheURLLoader(const ResourceRequest& request,
+void StartCacheURLLoader(const GURL& url,
                          net::URLRequestContext* request_context,
                          mojom::URLLoaderClientPtr client);
 
 }  // namespace content
 
 #endif  // CONTENT_NETWORK_CACHE_URL_LOADER_H_