Change Lo-Fi bool to bitmask to support multiple Previews types

content/browser/frame_host/navigator_impl.h

Index: content/browser/frame_host/navigator_impl.h
diff --git a/content/browser/frame_host/navigator_impl.h b/content/browser/frame_host/navigator_impl.h
index a8dd11b28c363f5e1845149eb1f857a87ea9f480..633a402d43e84a1bf16e3cf18efa481ca8e6be2c 100644
--- a/content/browser/frame_host/navigator_impl.h
+++ b/content/browser/frame_host/navigator_impl.h
@@ -15,6 +15,7 @@
 #include "content/browser/frame_host/navigator.h"
 #include "content/common/content_export.h"
 #include "content/common/navigation_params.h"
+#include "content/public/common/previews_state.h"
 #include "url/gurl.h"
 
 class GURL;
@@ -128,7 +129,7 @@ class CONTENT_EXPORT NavigatorImpl : public Navigator {
                          const FrameNavigationEntry& frame_entry,
                          const NavigationEntryImpl& entry,
                          ReloadType reload_type,
-                         LoFiState lofi_state,
+                         PreviewsState previews_state,
                          bool is_same_document_history_load,
                          bool is_history_navigation_in_new_child,
                          base::TimeTicks navigation_start);