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

chrome/browser/search/thumbnail_source.cc

 // 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.
 
 #include "chrome/browser/search/thumbnail_source.h"
 
 #include "base/callback.h"
 #include "base/memory/ref_counted_memory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/instant_io_context.h"
@@ skipping 66 matching lines @@
   return thumbnail_service_.get()
              ? nullptr
              : content::URLDataSource::TaskRunnerForRequestPath(path);
 }
 
 bool ThumbnailSource::AllowCaching() const {
   return false;
 }
 
 bool ThumbnailSource::ShouldServiceRequest(
-    const net::URLRequest* request) const {
-  if (request->url().SchemeIs(chrome::kChromeSearchScheme))
-    return InstantIOContext::ShouldServiceRequest(request);
-  return URLDataSource::ShouldServiceRequest(request);
+    const GURL& url,
+    content::ResourceContext* resource_context,
+    int render_process_id) const {
+  if (url.SchemeIs(chrome::kChromeSearchScheme)) {
+    return InstantIOContext::ShouldServiceRequest(url, resource_context,
+                                                  render_process_id);
+  }
+  return URLDataSource::ShouldServiceRequest(url, resource_context,
+                                             render_process_id);
 }
 
 void ThumbnailSource::ExtractPageAndThumbnailUrls(
     const std::string& path,
     GURL* page_url,
     GURL* fallback_thumbnail_url) {
   std::string page_url_str = path;
   std::string fallback_thumbnail_url_str;
 
   size_t pos = path.find(kUrlDelimiter);
@@ skipping 10 matching lines @@
     const content::URLDataSource::GotDataCallback& callback,
     const std::string& image_data,
     const image_fetcher::RequestMetadata& metadata) {
   if (image_data.empty()) {
     callback.Run(nullptr);
     return;
   }
   std::string image_data_copy = image_data;
   callback.Run(base::RefCountedString::TakeString(&image_data_copy));
 }