Revert of Add DidSaveScrollOrScaleState flag to prevent restoreScrollPosition...

content/renderer/history_serialization.cc

Index: content/renderer/history_serialization.cc
diff --git a/content/renderer/history_serialization.cc b/content/renderer/history_serialization.cc
index c24d9d74c4e0573a643a269cdd04a83cf800b14f..e84a7e00d572750b409662e37e2ceba5f961f76d 100644
--- a/content/renderer/history_serialization.cc
+++ b/content/renderer/history_serialization.cc
@@ -53,7 +53,6 @@ void GenerateFrameStateFromItem(const WebHistoryItem& item,
   state->item_sequence_number = item.ItemSequenceNumber();
   state->document_sequence_number = item.DocumentSequenceNumber();
   state->page_scale_factor = item.PageScaleFactor();
-  state->did_save_scroll_or_scale_state = item.DidSaveScrollOrScaleState();
   ToNullableString16Vector(item.GetDocumentState(), &state->document_state);
 
   state->http_body.http_content_type =
@@ -102,7 +101,6 @@ void RecursivelyGenerateHistoryItem(const ExplodedFrameState& state,
   item.SetVisualViewportScrollOffset(state.visual_viewport_scroll_offset);
   item.SetScrollOffset(state.scroll_offset);
   item.SetPageScaleFactor(state.page_scale_factor);
-  item.SetDidSaveScrollOrScaleState(state.did_save_scroll_or_scale_state);
 
   // These values are generated at WebHistoryItem construction time, and we
   // only want to override those new values with old values if the old values