Enable Mojo to download from file URLs

mojo/shell/context.cc

Index: mojo/shell/context.cc
diff --git a/mojo/shell/context.cc b/mojo/shell/context.cc
index 7f7ad79540069e4bfdbfc12bf240690ae721751e..c2e2f9043194b6557de0c385c21a138d86a7b6a5 100644
--- a/mojo/shell/context.cc
+++ b/mojo/shell/context.cc
@@ -4,6 +4,7 @@
 
 #include "mojo/shell/context.h"
 
+#include "mojo/shell/network_delegate.h"
 #include "mojo/system/core_impl.h"
 
 namespace mojo {
@@ -14,6 +15,7 @@ Context::Context()
       storage_(),
       loader_(task_runners_.io_runner(),
               task_runners_.file_runner(),
+              scoped_ptr<net::NetworkDelegate>(new NetworkDelegate()),
               storage_.profile_path()) {
   system::CoreImpl::Init();
 }