Generalize content::URLDataSource so that it can be used by the network service.

chrome/browser/search/thumbnail_source.h

 // Copyright (c) 2012 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 CHROME_BROWSER_SEARCH_THUMBNAIL_SOURCE_H_
 #define CHROME_BROWSER_SEARCH_THUMBNAIL_SOURCE_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
   // content::URLDataSource implementation.
   std::string GetSource() const override;
   void StartDataRequest(
       const std::string& path,
       const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
       const content::URLDataSource::GotDataCallback& callback) override;
   std::string GetMimeType(const std::string& path) const override;
   scoped_refptr<base::SingleThreadTaskRunner> TaskRunnerForRequestPath(
       const std::string& path) const override;
   bool AllowCaching() const override;
-  bool ShouldServiceRequest(const net::URLRequest* request) const override;
+  bool ShouldServiceRequest(const GURL& url,
+                            content::ResourceContext* resource_context,
+                            int render_process_id) const override;
 
   // Extracts the |page_url| (e.g. cnn.com) and the |fallback_thumbnail_url|
   // fetchable from the server, if present, from the |path|. Visible for
   // testing.
   void ExtractPageAndThumbnailUrls(const std::string& path,
                                    GURL* page_url,
                                    GURL* fallback_thumbnail_url);
 
  private:
   void SendFetchedUrlImage(
@@ skipping 14 matching lines @@
   const bool capture_thumbnails_;
 
   image_fetcher::ImageDataFetcher image_data_fetcher_;
 
   base::WeakPtrFactory<ThumbnailSource> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ThumbnailSource);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_THUMBNAIL_SOURCE_H_