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

chrome/browser/thumbnails/thumbnail_list_source.cc

Index: chrome/browser/thumbnails/thumbnail_list_source.cc
diff --git a/chrome/browser/thumbnails/thumbnail_list_source.cc b/chrome/browser/thumbnails/thumbnail_list_source.cc
index 7966ac0e793807ed50546cd4301c3db728bf99fa..45fbf68614aa44eafd4a52b32ab2afe27a0aec4f 100644
--- a/chrome/browser/thumbnails/thumbnail_list_source.cc
+++ b/chrome/browser/thumbnails/thumbnail_list_source.cc
@@ -124,10 +124,14 @@ ThumbnailListSource::TaskRunnerForRequestPath(const std::string& path) const {
 }
 
 bool ThumbnailListSource::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);
 }
 
 bool ThumbnailListSource::ShouldReplaceExistingSource() const {