Bug 1496161 - Add installTelemetryInfo to converted webext themes installed from the LWTManager. r=aswan

Differential Revision: https://phabricator.services.mozilla.com/D7708

--HG--
extra : moz-landing-system : lando

toolkit/mozapps/extensions/LightweightThemeManager.jsm

@@ -293,7 +293,8 @@ var LightweightThemeManager = {
 
     if ("converted_theme" in parsed) {
       const {url, hash} = parsed.converted_theme;
-      let install = await AddonManager.getInstallForURL(url, "application/x-xpinstall", hash);
+      let install = await AddonManager.getInstallForURL(url, "application/x-xpinstall", hash,
+                                                        null, null, null, null, {source: "lwt-converted-theme"});
 
       install.addListener({
         onDownloadEnded() {

toolkit/mozapps/extensions/test/xpcshell/test_theme_update.js

@@ -127,6 +127,10 @@ add_task(async function test_theme_updates() {
      "Theme 1 has been updated to an XPI packaged theme");
   equal(theme1.userDisabled, true, "Theme 1 is not active");
 
+  Assert.deepEqual(theme1.installTelemetryInfo, {
+    source: "lwt-converted-theme",
+  }, "Got the expected source on the converted webextension theme");
+
   // Update the current LWT to an XPI
   updates["/2"] = {
     converted_theme: {
@@ -146,6 +150,10 @@ add_task(async function test_theme_updates() {
      "Theme 2 has been updated to an XPI packaged theme");
   equal(theme2.userDisabled, false, "Theme 2 is active");
 
+  Assert.deepEqual(theme2.installTelemetryInfo, {
+    source: "lwt-converted-theme",
+  }, "Got the expected source on the converted webextension theme");
+
   // Serve an update with a bad hash, the LWT should remain in place.
   updates["/3"] = {
     converted_theme: {