Remove popup overlay from MHTML when requested

components/offline_pages/core/offline_page_model.cc

Index: components/offline_pages/core/offline_page_model.cc
diff --git a/components/offline_pages/core/offline_page_model.cc b/components/offline_pages/core/offline_page_model.cc
index 4b0d2815823801176e2af969a3c4280089ff5bc1..5a9ddd89eb8a094f27855db73c9f33be6e693992 100644
--- a/components/offline_pages/core/offline_page_model.cc
+++ b/components/offline_pages/core/offline_page_model.cc
@@ -11,14 +11,15 @@ namespace offline_pages {
 const int64_t OfflinePageModel::kInvalidOfflineId;
 
 OfflinePageModel::SavePageParams::SavePageParams()
-    : proposed_offline_id(OfflinePageModel::kInvalidOfflineId) {
-}
+    : proposed_offline_id(OfflinePageModel::kInvalidOfflineId),
+      remove_popup_overlay(false) {}
 
 OfflinePageModel::SavePageParams::SavePageParams(const SavePageParams& other) {
   url = other.url;
   client_id = other.client_id;
   proposed_offline_id = other.proposed_offline_id;
   original_url = other.original_url;
+  remove_popup_overlay = other.remove_popup_overlay;
 }
 
 // static