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

chrome/browser/ui/webui/favicon_source.h

Index: chrome/browser/ui/webui/favicon_source.h
diff --git a/chrome/browser/ui/webui/favicon_source.h b/chrome/browser/ui/webui/favicon_source.h
index 6d253474607ac26d948d9057b7f6ce90def853b3..1f4546c06005d55bafd598bb359ce3f34ace6419 100644
--- a/chrome/browser/ui/webui/favicon_source.h
+++ b/chrome/browser/ui/webui/favicon_source.h
@@ -68,7 +68,9 @@ class FaviconSource : public content::URLDataSource {
   std::string GetMimeType(const std::string&) const override;
   bool AllowCaching() const override;
   bool ShouldReplaceExistingSource() 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;
 
  protected:
   struct IconRequest {