Block renderer-initiated main frame navigations to data URLs

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index c3c3fa73f859706e237d986e0e520be77c31fb6b..b3a906f37dd2f60dd0164b787f88e430469d9bbf 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -131,6 +131,7 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   RenderFrameHostImpl* GetRenderFrameHost() override;
   bool IsSameDocument() override;
   bool HasCommitted() override;
+  bool IsDownload() override;

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

This will move down and become is_download(), since we should not expose it
through the public interface quite yet.

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

By move down I assume you mean move away from the interface. If so, done.

   bool IsErrorPage() override;
   bool HasSubframeNavigationEntryCommitted() override;
   bool DidReplaceEntry() override;