Revert "Remove unwanted newtab page code"

This reverts commit 277fa0afdc50b707b3227ca327c29766cdcd20f1.

application/basilisk/base/content/newtab/page.js

@@ -48,6 +48,11 @@ var gPage = {
       let enabled = gAllPages.enabled;
       this._updateAttributes(enabled);
 
+      // Update thumbnails to the new enhanced setting
+      if (aData == "browser.newtabpage.enhanced") {
+        this.update();
+      }
+
       // Initialize the whole page if we haven't done that, yet.
       if (enabled) {
         this._init();
@@ -74,7 +79,10 @@ var gPage = {
   update(reason = "") {
     // Update immediately if we're visible.
     if (!document.hidden) {
-      if (gGrid.ready) {
+      // Ignore updates where reason=links-changed as those signal that the
+      // provider's set of links changed. We don't want to update visible pages
+      // in that case, it is ok to wait until the user opens the next tab.
+      if (reason != "links-changed" && gGrid.ready) {
         gGrid.refresh();
       }
 
@@ -111,6 +119,10 @@ var gPage = {
     document.getElementById("newtab-search-submit").value =
       document.body.getAttribute("dir") == "ltr" ? "\u25B6" : "\u25C0";
 
+    if (Services.prefs.getBoolPref("browser.newtabpage.compact")) {
+      document.body.classList.add("compact");
+    }
+
     // Initialize search.
     gSearch.init();
 
@@ -248,6 +260,8 @@ var gPage = {
   onPageVisibleAndLoaded() {
     // Send the index of the last visible tile.
     this.reportLastVisibleTileIndex();
+    // Maybe tell the user they can undo an initial automigration
+    this.maybeShowAutoMigrationUndoNotification();
   },
 
   reportLastVisibleTileIndex() {
@@ -273,5 +287,11 @@ var gPage = {
         }
       }
     }
-  }
+
+    DirectoryLinksProvider.reportSitesAction(sites, "view", lastIndex);
+  },
+
+  maybeShowAutoMigrationUndoNotification() {
+    sendAsyncMessage("NewTab:MaybeShowAutoMigrationUndoNotification");
+  },
 };