Block renderer-initiated main frame navigations to data URLs

content/public/browser/navigation_handle.h

Index: content/public/browser/navigation_handle.h
diff --git a/content/public/browser/navigation_handle.h b/content/public/browser/navigation_handle.h
index 684fd26aa145b62a67505afb0e6db0e3a5ab4456..6ead5afab55cf4df669e394b867488bcd944fc1b 100644
--- a/content/public/browser/navigation_handle.h
+++ b/content/public/browser/navigation_handle.h
@@ -183,6 +183,11 @@ class CONTENT_EXPORT NavigationHandle {
   // errors that leave the user on the previous page.
   virtual bool HasCommitted() = 0;
 
+  // Whether the navigation request is a download. This is useful when the
+  // navigation hasn't committed yet, in which case HasCommitted() will return
+  // false even if the navigation request is not a download.
+  virtual bool IsDownload() = 0;

[nasko, 2017/03/30 23:15:45]

We don't need to expose this method at this time, as I didn't see any callers
outside of content/ for now.

[meacer, 2017/04/05 22:33:28]

Done.

+
   // Whether the navigation resulted in an error page.
   // Note that if an error page reloads, this will return true even though
   // GetNetErrorCode will be net::OK.