Consistently use LoFi for an entire page

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index 37b1af035401ee8e9ab394831888b68c6519e4e9..d68a48d72481f0f0d63d225c5279455f182191a1 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -11,6 +11,7 @@
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
+#include "content/public/common/data_reduction_proxy_lofi_user_data.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/referrer.h"
 #include "ui/base/page_transition_types.h"
@@ -257,6 +258,10 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // needs to notify the browser that the clearing was succesful when the
   // navigation commits.
   bool should_clear_history_list;
+
+  // Whether or not to request a LoFi version of the document or let the browser
+  // decide.
+  LoFiState lofi_state;
 };
 
 // Helper struct keeping track in one place of all the parameters the browser