Update CPAT protocol to send lite-page transform acceptance with ect

content/browser/frame_host/navigator_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/navigator_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 345 matching lines @@
   // Determine if Previews should be used for the navigation.
   PreviewsState previews_state = PREVIEWS_UNSPECIFIED;
   if (!frame_tree_node->IsMainFrame()) {
     // For subframes, use the state of the top-level frame.
     previews_state = frame_tree_node->frame_tree()
                      ->root()
                      ->current_frame_host()
                      ->last_navigation_previews_state();
   } else if (reload_type == ReloadType::DISABLE_LOFI_MODE) {
     // Disable LoFi when asked for it explicitly.
-    previews_state = PREVIEWS_NO_TRANSFORM;
+    previews_state = PREVIEWS_OFF;

[bengr, 2017/05/01 16:53:14]

What is the significance of this change?

   }
 
   // PlzNavigate: the RenderFrameHosts are no longer asked to navigate.
   if (IsBrowserSideNavigationEnabled()) {
     navigation_data_.reset(new NavigationMetricsData(navigation_start, dest_url,
                                                      entry.restore_type()));
     RequestNavigation(frame_tree_node, dest_url, dest_referrer, frame_entry,
                       entry, reload_type, previews_state,
                       is_same_document_history_load,
                       is_history_navigation_in_new_child, navigation_start);
@@ skipping 919 matching lines @@
     if (navigation_handle)
       navigation_handle->update_entry_id_for_transfer(entry->GetUniqueID());
 
     controller_->SetPendingEntry(std::move(entry));
     if (delegate_)
       delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
   }
 }
 
 }  // namespace content