Allow top-level navigation in extension pop-ups if it only triggers a download.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 10187d104037ca97078b9e33ddeca6b6f2b2886f..1e79ab384a1d3dee1c1fac4d0e239cc212ff6495 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -3346,10 +3346,10 @@ void WebContentsImpl::RequestOpenURL(RenderFrameHostImpl* render_frame_host,
   }
 }
 
-bool WebContentsImpl::ShouldTransferNavigation() {
+bool WebContentsImpl::ShouldTransferNavigation(bool is_main_frame_navigation) {
   if (!delegate_)
     return true;
-  return delegate_->ShouldTransferNavigation();
+  return delegate_->ShouldTransferNavigation(is_main_frame_navigation);
 }
 
 bool WebContentsImpl::ShouldPreserveAbortedURLs() {