Enable Mojo to download from file URLs

mojo/shell/loader.h

Index: mojo/shell/loader.h
diff --git a/mojo/shell/loader.h b/mojo/shell/loader.h
index 52c5ea37c7650dd9a20c45c722e54d8f5664c775..ea7707985f30cc1a4ac42d0768729421ce505e8f 100644
--- a/mojo/shell/loader.h
+++ b/mojo/shell/loader.h
@@ -14,6 +14,10 @@
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
 
+namespace net {
+class NetworkDelegate;
+}
+
 namespace mojo {
 namespace shell {
 
@@ -48,6 +52,7 @@ class Loader {
 
   Loader(base::SingleThreadTaskRunner* network_runner,
          base::SingleThreadTaskRunner* file_runner,
+         scoped_ptr<net::NetworkDelegate> network_delegate,
          base::FilePath base_path);
   ~Loader();