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

chrome/browser/ui/webui/large_icon_source.h

Index: chrome/browser/ui/webui/large_icon_source.h
diff --git a/chrome/browser/ui/webui/large_icon_source.h b/chrome/browser/ui/webui/large_icon_source.h
index 14ae4f7d6c708bfa8d675f68b457af343af06346..a7322df1cbf32a51cc2fa48d8d88e47d74ecc526 100644
--- a/chrome/browser/ui/webui/large_icon_source.h
+++ b/chrome/browser/ui/webui/large_icon_source.h
@@ -53,7 +53,9 @@ class LargeIconSource : 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;
 
  private:
   // Called with results of large icon retrieval request.