Bug 1486631 - Add CFR, search shortcut fixes, and bug fixes to Activity Stream r=Mardak,ursula

MozReview-Commit-ID: HZbYyg4FGwi

Differential Revision: https://phabricator.services.mozilla.com/D4392

browser/components/newtab/content-src/lib/asroutercontent.js

@@ -0,0 +1,13 @@
+export function enableASRouterContent(store, asrouterContent) {
+  // Enable asrouter content
+  store.subscribe(() => {
+    const state = store.getState();
+    if (state.Prefs.values.asrouterExperimentEnabled && !asrouterContent.initialized) {
+      asrouterContent.init();
+    } else if (!state.Prefs.values.asrouterExperimentEnabled && asrouterContent.initialized) {
+      asrouterContent.uninit();
+    }
+  });
+  // Return this for testing purposes
+  return {asrouterContent};
+}