Enable Mojo to download from file URLs

mojo/loader/loader.h

Index: mojo/loader/loader.h
diff --git a/mojo/loader/loader.h b/mojo/loader/loader.h
index 90581e154c66b345b16b16c5c1e851d9187a3b26..8fb356c1496032a76da7add4ec18ae5ca1f18440 100644
--- a/mojo/loader/loader.h
+++ b/mojo/loader/loader.h
@@ -11,6 +11,10 @@
 #include "mojo/loader/job.h"
 #include "url/gurl.h"
 
+namespace net {
+class NetworkDelegate;
+}
+
 namespace mojo {
 namespace loader {
 
@@ -18,6 +22,7 @@ class Loader {
  public:
   Loader(base::SingleThreadTaskRunner* network_runner,
          base::SingleThreadTaskRunner* file_runner,
+         scoped_ptr<net::NetworkDelegate> network_delegate,
          base::FilePath base_path);
   ~Loader();