Add an about:flag to enable client-side LoFi

components/previews/core/previews_features.cc

Index: components/previews/core/previews_features.cc
diff --git a/components/previews/core/previews_features.cc b/components/previews/core/previews_features.cc
index 879bd237e4278ccf056afb61aa28697ed2932d53..d88577c41f2415d67e33df414fab4161aa8ab400 100644
--- a/components/previews/core/previews_features.cc
+++ b/components/previews/core/previews_features.cc
@@ -11,5 +11,9 @@ namespace features {
 const base::Feature kOfflinePreviews{"OfflinePreviews",
                                      base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables the Client Lo-Fi previews on Android.
+const base::Feature kClientLoFi{"ClientLoFi",
+                                base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace features
 }  // namespace previews