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

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 8556fb22081e5b385925be502ca5585fa0bcaa37..ae0d297a5819b89839aca8ad533be62717df26dd 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -337,7 +337,7 @@ RenderFrameHostImpl::RenderFrameHostImpl(SiteInstance* site_instance,
       pending_web_ui_type_(WebUI::kNoWebUI),
       should_reuse_web_ui_(false),
       has_selection_(false),
-      last_navigation_lofi_state_(LOFI_UNSPECIFIED),
+      last_navigation_previews_state_(PREVIEWS_UNSPECIFIED),
       frame_host_binding_(this),
       waiting_for_init_(renderer_initiated_creation),
       weak_ptr_factory_(this) {
@@ -2434,7 +2434,7 @@ void RenderFrameHostImpl::NavigateToInterstitialURL(const GURL& data_url) {
       data_url, Referrer(), ui::PAGE_TRANSITION_LINK,
       FrameMsg_Navigate_Type::NORMAL, NavigationGestureAuto, false, false,
       base::TimeTicks::Now(), FrameMsg_UILoadMetricsReportType::NO_REPORT,
-      GURL(), GURL(), LOFI_OFF, base::TimeTicks::Now(), "GET", nullptr);
+      GURL(), GURL(), PREVIEWS_OFF, base::TimeTicks::Now(), "GET", nullptr);
   if (IsBrowserSideNavigationEnabled()) {
     CommitNavigation(nullptr, nullptr, common_params, RequestNavigationParams(),
                      false);
@@ -2617,9 +2617,9 @@ void RenderFrameHostImpl::CommitNavigation(
   Send(new FrameMsg_CommitNavigation(routing_id_, head, body_url, common_params,
                                      request_params));
 
-  // If a network request was made, update the LoFi state.
+  // If a network request was made, update the Previews state.
   if (ShouldMakeNetworkRequestForURL(common_params.url))
-    last_navigation_lofi_state_ = common_params.lofi_state;
+    last_navigation_previews_state_ = common_params.previews_state;
 
   // TODO(clamy): Release the stream handle once the renderer has finished
   // reading it.