PlzNavigate: send SourceLocation when mixed content is found

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index e08de5755b08783c751151e708b3c9f74494b4b2..1c7d2e3c272c5c0d87a503d131aedf37b38f027b 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -418,6 +418,11 @@ void NavigationRequest::CreateNavigationHandle(int pending_nav_entry_id) {
     navigation_handle_->set_searchable_form_encoding(
         begin_params_.searchable_form_encoding);
   }
+
+  if (common_params_.source_location) {
+    navigation_handle_->set_source_location(
+        common_params_.source_location.value());
+  }
 }
 
 void NavigationRequest::TransferNavigationHandleOwnership(