Prepending view-source: does not load the source of the userscript.

content/public/renderer/navigation_state.h

Index: content/public/renderer/navigation_state.h
diff --git a/content/public/renderer/navigation_state.h b/content/public/renderer/navigation_state.h
index cb6bc64208028a8476ddb7d4feea5af84486b9da..f33e515d9793379c28cf28697c229aed011ae5ba 100644
--- a/content/public/renderer/navigation_state.h
+++ b/content/public/renderer/navigation_state.h
@@ -73,6 +73,12 @@ class NavigationState {
   int transferred_request_request_id() const {
     return transferred_request_request_id_;
   }
+  void set_allow_download(bool value) {
+    allow_download_ = value;
+  }
+  bool allow_download() const {
+    return allow_download_;
+  }
 
  private:
   NavigationState(content::PageTransition transition_type,
@@ -89,6 +95,7 @@ class NavigationState {
   bool was_within_same_page_;
   int transferred_request_child_id_;
   int transferred_request_request_id_;
+  bool allow_download_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationState);
 };