Bug 1912351 - Create onSearch trigger and targeting r=mviar,omc-reviewers,urlbar-reviewers,dao

Differential Revision: https://phabricator.services.mozilla.com/D219519

browser/components/asrouter/modules/ASRouterTargeting.sys.mjs

@@ -147,6 +147,12 @@ XPCOMUtils.defineLazyPreferenceGetter(
     return behaviorString === "embedded";
   }
 );
+XPCOMUtils.defineLazyPreferenceGetter(
+  lazy,
+  "totalSearches",
+  "browser.search.totalSearches",
+  0
+);
 
 XPCOMUtils.defineLazyServiceGetters(lazy, {
   AUS: ["@mozilla.org/updates/update-service;1", "nsIApplicationUpdateService"],
@@ -1063,6 +1069,10 @@ const TargetingGetters = {
     }
     return memory;
   },
+
+  get totalSearches() {
+    return lazy.totalSearches;
+  },
 };
 
 export const ASRouterTargeting = {